Knull

Lifelink, first strike, death touch, vigilance
Creatures you control without toxic get toxic 1.
Tokens you control have +2/+1
Whenever an opponent receives a poison counter, proliferate.
{1}{w/b}:create one 1/1 phyrexian mite creature token with toxic 1, reconfigure {2} and. the creature this is equipped to gets a +1/+1 counter at the beginning of your upkeep.