The Headless Horseman

Convoke (Your creatures can help cast this spell.
Each creature you tap while casting this spell pays
for {1} or one mana of that creature’s color.)
Haste, trample, vigilance, menace
This creature gets +1/+0 for each Squashling creature on the battlefield.
Whenever the Headless Horseman attacks or
blocks, create a 0/1 green Squashling creature
token.