Walrein

Rain Dance

Ice Ball — Whenever Walrein attacks, put a +1/+1
counter onto it. Walrein can't be blocked by a
creature with X or less CMC, where X is equal to
the number of +1/+1 counters on it. Walrein must
attack each turn if able.

Call A Friend — {u}{u}{1}: Create a 1/1 blue Spheal
token with "If it is raining, Spheal can't be blocked
by a creature with 2 or less CMC".