Columbus, Toxic Explorer

Infect, Vigilance.
{b}{b}{t}: Put a -1/-1 counter on target creature as
long as it does not share a creature type with
Columbus, Toxic Explorer.
{w}{u}{b}{t}: Put a claim counter on target
permanent an opponent controls.
On your upkeep, untap and gain control of each
permanent with a claim counter on it until end
of turn. Any time a player has seven or more
permanents they own with claim counters
on them, they lose the game.