Time Thief Snail

Defender, Indestructible, Persist (When this
creature dies, if it had no -1/-1 counters on it,
return it to the battlefield under its owner's control
with a -1/-1 counter on it.)
Whenever Time Thief Snail enters or leaves the
battlefield, if you have 10 less life than target
opponent, that opponent skips their next turn
and you Scry 5 then draw a card. Otherwise,
each player discards their hand and draws
three cards.