Awai, Twinned Corrosives

Wither (Awai deals damage to creatures in the form
of -1/-1 counters.)
At the beginning of your upkeep, put a -1/-1
counter on Awai unless you sacrifice an artifact.
Whenever Awai attacks, you may pay {x}{x}. If
you do, each player distributes X -1/-1 counters
among any number of target creatures. Until
end of turn, whenever a creature dies, each player
draws a card.