Marrow Lurker

Marrow Lurker enters the battlefield with X +1/+1 counters on it, where X is the number of Islands you control
{u}, remove a +1/+1 counter from Marrow Lurker:
Draw a card
{u}, remove x +1/+! counters from Marrow Lurker:
Put X -1/-1 counters on target creature
When Marrow Lurker dies, draw cards equal to the
number of islands you control