+Sliver, +@(G) (18)
Whenever a Sliver deals combat damage to a player, its controller may create a 1/1 colorless Sliver creature token.
All Sliver creatures have "Whenever this creature is dealt damage, put a +1/+1 counter on it." (It must survive the damage to get the counter.)
All Slivers have ": Add one mana of any color."
Sliver creatures you control have trample. (A creature with trample can deal excess combat damage to the player or planeswalker it's attacking.)
Replicate (When you cast this spell, copy it for each time you paid its replicate cost.)
Each Sliver spell you cast has replicate. The replicate cost is equal to its mana cost. (A copy of a permanent spell becomes a token.)
All Sliver creatures have trample.
Sliver creatures you control have ": Add one mana of any color."
Sliver creatures you control get +3/+3.
All Sliver creatures get +2/+2.
All Sliver creatures get +1/+1.
Sliver creatures you control get +1/+1.
Flash
Any player may cast Sliver spells as though they had flash.
All Sliver creatures have haste.
This spell can't be countered.
Sliver spells can't be countered.
All Sliver creatures have reach.
Sliver creatures you control have "Whenever this creature deals combat damage to a player, put a +1/+1 counter on it."
Sliver creatures you control have deathtouch. (Any amount of damage a creature with deathtouch deals to a creature is enough to destroy it.)
All Sliver creatures have poisonous 1. (Whenever a Sliver deals combat damage to a player, that player gets a poison counter. A player with ten or more poison counters loses the game.)
Gatherer works better in the Companion app!
(When you cast this spell, copy it for each time you paid its replicate cost.)