Birds Nest

{t}Create X 0/1 hatchling bird creature tokens
with defender, flying, and leveling "At the
beginning of your upkeep put one level counter
on hatchling
L1 1/2 flying, L2 2/3 flying L3 3/4 Flying
L4 4/5 flying L6 5/6 Flying L7 6/7 Flying
L8+ Hatchling gets +1/+0
L20 sacrifice hatchling, create a token that
is a copy of Birds nest"