Snaildramog, Slimer of Worlds

When you cast this spell, put seven Snaildrazi
counters on up to seven permanents.

Flying, Indestructible, Trample
Permanents with Snaildrazi counters on them lose
all abilities and become colorless Snaildrazi
creatures with power and toughness equal to the
number of Snaildrazi counters on them.
At the end of each turn chose a permanent and
put a Snaildrazi counter on it.