Zwigu-Basil, the Silencer

Menace (This creature can't be blocked except by two
or more creatures.)
Skulk (This creature can't be blocked by creatures
with greater power.)
Whenever Zwigu-Basil deals combat damage to a player, exile target creature that player controls
and put a hit counter on that card. That player
loses the game if they own three or more exiled
cards with hit counters on them. Zwigu-Basil's
owner shuffles Zwigu-Basil into their library.