Short answer: No, pick one creature or the other for each time/source would damage you.
slightly longer: Each pariah has a replacement affect (notice word "instead"). You are the player being affected, therefore you get to choose which to apply first. After you have applied one and redirected the damage to that creature, the second one no longer applies and can not be used as the damage is no longer being delt to you.
This should make it clear. Focus on the bold and the second example. And that rend flesh with glacial ray, has two targets as others have stated.
from the comp rules (the examples are also quoted and not made up by me):
413.2a If the spell or ability specifies targets, it checks whether the targets are still legal. A target that’s removed from play, or from the zone designated by the spell or ability, is illegal. A target may also become illegal if its characteristics changed since the spell or ability was played or if an effect changed the text of the spell. The spell or ability is countered if all its targets, for every instance of the word “target,” are now illegal. If the spell or ability is not countered, it will
resolve normally, affecting only the targets that are still legal. If a target is illegal, the spell or ability can’t perform any actions on it or make the target perform any actions. If the spell or ability needs to know information about one or more targets that are now illegal, it will use the illegal targets’ current or last known information.
Example: Aura Blast is a white instant that reads, “Destroy target enchantment. Draw a card.” If the enchantment isn’t a legal target during Aura Blast’s resolution (say, if it has gained protection from white or left play), then Aura Blast is countered. Its controller doesn’t draw a card.
Example: Plague Spores reads, “Destroy target nonblack creature and target land.
They can’t be regenerated.” Suppose the same animated land is chosen both as the
nonblack creature and as the land, and the color of the creature land is changed to black before Plague Spores resolves. Plagues Spores isn’t countered because the black creature land is still a legal target for the “target land” part of the spell
Why: Despite the fact you are controling his turn, he is controling his mindslaver (and it's ability). Hence, the "you" in mindslaver's ability will refer to him. Therefore, he will control his next turn (and you will no longer be making decisions for him at that point).
This means that spiders are now forced to block as though they had flying?
So if a Dense Canopy is in play:
A Giant Spider can no longer block non-flying creatures (such as another Giant Spider). (a *judge* correct me if i'm wrong)
That seems mildly unintuitive (and non-flavorful, which is irrelevant to rules discussions). Not sure if that is an improvement over the strange Lure interaction with the old style spider. Then again, there are many more cards with the Lure ability than the Dense Canopy ability.
Disciple needed to go. Ever notice that burn (life-loss) is better than life gain. Now compare this to it's white counterpart. It was clearly way too powerful.
No whether to ban ravager or arti-lands seems a coin-flip, but considering ban ravager seems simpler. Ravager is clearly way overpowered, at the very least they should have upped its cc and added a mana-cost to the sac-ability.
Banning the arti-lands is banning a lot of (common) cards and severely cripples a number of other deck-types. Whether or not that was over-kill has yet to be seen. It is certainly erring on the side of environmental caution. (also i suppose in reality people are less upset of banning commons than hard-to-find rares; despite the expected power-level/rarity expected in general). If the decks recover but are less powerful, then "good job", but if they don't then clearly they went overboard however i won't miss the dead decks.
The veil adds more bouncy ninja tricks.. seems to be a theme or something ;-)
The growth is not particularly interesting at most it lest you save a creature for three mana or giving your opponent 5 life. Not really good. compare with Invigorate
Couple addendums to the summary:
All counters/enchantments/equipment phase out with it.
Unlike whenever other cards change zones, a creature/permanent phasing in retains all of it's "memory" and is considered to be the same permanent that it was when it phased out.
Announce which creatures are in a band as you declare attackers/blockers. (Technically blockers don't make a "band" because you're already allowed to "gang block" creatures, but that distinction is fairly moot.)
To form a band of blockers: at least one must have banding
To form a band of attackers: all but at most one must have banding (only up to one non-banding creature in an attacking band.)
If a creature in an attacking band is blocked by a creature (or any effect), then all of the creatures in the band are blocked by that creature.
In either case, you decide how opposing creatures deal (combat) damage to the band when blocking/blocked.
Solid and interesting, although not quite as much a surprise as you might like because you need mana for the arcane spell to splice it onto. sorta cool. First strike is strong and it's a cheap hard-cast too, so it is definately a playable card
Now it is an interesting card. Hose splice (unless they have a ton of mana to hard cast all the spliced cards in responce). Still costs too much to be played.
The red one plays against itself too much. Sacing lands, but you need lands (mana) to cast the spells to splice it onto.
The black one is good, because there are a lot of cards that wind up in the yard that don't matter (non-spirit cards, and non-arcane if you have hana kami) to trade in for nice creature removal. yay
slightly longer: Each pariah has a replacement affect (notice word "instead"). You are the player being affected, therefore you get to choose which to apply first. After you have applied one and redirected the damage to that creature, the second one no longer applies and can not be used as the damage is no longer being delt to you.
from the comp rules (the examples are also quoted and not made up by me):
After having done that, any extra damage he may divide a he chooses among all of the blocking creatures and you.
Prevention effects (including when granted from "Protection from foo") are not taken into consideration.
Why: Despite the fact you are controling his turn, he is controling his mindslaver (and it's ability). Hence, the "you" in mindslaver's ability will refer to him. Therefore, he will control his next turn (and you will no longer be making decisions for him at that point).
So if a Dense Canopy is in play:
A Giant Spider can no longer block non-flying creatures (such as another Giant Spider). (a *judge* correct me if i'm wrong)
That seems mildly unintuitive (and non-flavorful, which is irrelevant to rules discussions). Not sure if that is an improvement over the strange Lure interaction with the old style spider. Then again, there are many more cards with the Lure ability than the Dense Canopy ability.
No whether to ban ravager or arti-lands seems a coin-flip, but considering ban ravager seems simpler. Ravager is clearly way overpowered, at the very least they should have upped its cc and added a mana-cost to the sac-ability.
Banning the arti-lands is banning a lot of (common) cards and severely cripples a number of other deck-types. Whether or not that was over-kill has yet to be seen. It is certainly erring on the side of environmental caution. (also i suppose in reality people are less upset of banning commons than hard-to-find rares; despite the expected power-level/rarity expected in general). If the decks recover but are less powerful, then "good job", but if they don't then clearly they went overboard however i won't miss the dead decks.
The growth is not particularly interesting at most it lest you save a creature for three mana or giving your opponent 5 life. Not really good. compare with Invigorate
All counters/enchantments/equipment phase out with it.
Unlike whenever other cards change zones, a creature/permanent phasing in retains all of it's "memory" and is considered to be the same permanent that it was when it phased out.
To form a band of blockers: at least one must have banding
To form a band of attackers: all but at most one must have banding (only up to one non-banding creature in an attacking band.)
If a creature in an attacking band is blocked by a creature (or any effect), then all of the creatures in the band are blocked by that creature.
In either case, you decide how opposing creatures deal (combat) damage to the band when blocking/blocked.
but seriously... it's a pretty bad card.
The black one is good, because there are a lot of cards that wind up in the yard that don't matter (non-spirit cards, and non-arcane if you have hana kami) to trade in for nice creature removal. yay
I don't think it will see much play outside of limited (of course that is true of most cards)