The Witch-Maw, Devourer

Whenever you cast a spell, put 2 +1/+1
counters on The Witch-Maw, Devourer

As long as The Witch-Maw has 10 or more
+1/+1 counters on it, it has trample and
"Remove all +1/+1 counters from this
creature, Gain X life and Draw half X cards, rounded up, where X is the amount of
counters removed this way"