Zuro, The Spined Island

{t}: Add {u} or {r} to your mana pool.
When Zuro, The Spined Island enters the field put 4 sleeping counters on it. As long as Zuro, The Spined Island has a sleeping counter on it, it can't attack or block.
{2}{u}{r}: Remove a sleeping counter from
Zuro, The Spined Island.