Howawi’s Dream-Prison

Howawi`s Dream-Prison enters the battlefield
with three slumber counters on it.
{1}, Remove a slumber counter from Howawi`s
Dream prison: You gain 2 life and draw a card.
At the beginning of your end step, if there are no
slumber counters on Howawi`s Dream-Prison,
sacrifice it. Then target opponent creates a
legendary 6/6 blue and green Serpent creature
token named Howawi, Lord of Longmere.