Shadow EEL

Infect, Swampwalk, Islandwalk, Hexproof
Shadow EEL can't block
{t}Remove two poison counters from target player.
Regenerate target Shark, Fish or Merfolk.
Whenever a Shark, Fish, or Merfolk with a power
of 2 or less is regenerated, put a poison counter
on target opponent.
Whenever a player would loose the game
due to poison counters, that player
may instead put a +1/+1 counter on each
zombie on the battlefield.