Bloodthirst doesn't trigger. Ajani's pridemate would die when it enters the battlefield unless there is something like an anthem in effect, while the hellkite enters as a 10/10 if you have bloodthirst.
For instance, if you have bloodthirst, Stormblood Berserker could be played when Elesh Norn is on the battlefield as a 1/1.
Should go 6-0 against Karntron...he can't resolve Karn or Clockwork before Stuffy (because of chancellor), and I make him discard his 7 cost card. Stuffy loses to Stabwhisker.
It doesn't work with Journey or O-Ring, but supposing you had a pacifism in your graveyard, you could bring it back with Sun Titan and attach it to their shrouded creature.
Trinisphere doesn't change the converted mana cost of the spell. Trinisphere just changes the total cost of all spells that are less than 3 to 3 (including whatever colours would have been paid).
In this case, since cascade wants to cast a spell that costs 0, Trinisphere changes it so your spreading seas costs 3 instead.
Life and Limb so your saprolings can actually ramp you to huge amounts of mana.
Jade Mage to make even more saprolings
Glare of Subdual and Vitu-Ghazi, the City Tree as the old Ghazi-Glare deck
Sprout Swarm for even more guys
Thelonite Hermit, the saproling lord
Utopia Mycon as a cheap 1 drop
Verdant Force as something to ramp into
For instance, if you have bloodthirst, Stormblood Berserker could be played when Elesh Norn is on the battlefield as a 1/1.
He has to pay 1 or it gets countered
uh oh spaghettios
You're thinking of steel hellkite, aren't you?
Mimic vat is a pretty good card for them too.
In this case, since cascade wants to cast a spell that costs 0, Trinisphere changes it so your spreading seas costs 3 instead.