Zumtao, Giant of Cold

{x}{t} Give all creatures two -1-1 counters.
({x} is the amount of damage you have taken
this turn)
When this card blocks, you may search
your library for a instant, reveal it, and put it
in your hand. When you play that instant
you may pay {u/b}{u/b} and get
{u}{u}{u}{u}{u}.