Fungus Sliver

Oracle Text

All Sliver creatures have "Whenever this creature is dealt damage, put a +1/+1 counter on it." (The damage is dealt before the counter is put on.)

Card Rulings

7/1/2013 Abilities that Slivers grant, as well as power/toughness boosts, are cumulative. However, for some abilities, like flying, having more than one instance of the ability doesn’t provide any additional benefit.
7/1/2013 If the creature type of a Sliver changes so it’s no longer a Sliver, it will no longer be affected by its own ability. Its ability will continue to affect other Sliver creatures.

Additional Information