Shredder, Shadow Master | 3 Colorless Mana, 2 Black Mana Legendary Creature Human Ninja Whenever Shredder attacks a player, for each of their opponents, create a token thats a copy of Shredder tapped and attacking that player, except it isnt legendary
: Until end of turn, if you would put one or more +1/+1 counters on a creature you control, put that many plus one +1/+1 counters on it instead
If youd like to play around with a more reactive deck, then you might be able to get some ideas from this one
Larger sources of poison might still get through, but it still doubles the effort your opponent will need to put in to win
The effects must occur on cast for a one-time use
It doesnt fit in particularly strongly in this deck for any other reason than it is a heavy hitter capable of closing out games without the need to attach energy