Shai Hulud, The Great Worm

Haste

When Shai-Hulud Enters, creatures you
control gain trample and get +X/+X until end
of turn, where x is the number of creatures you control.

"Bless the Maker and His water. Bless the coming and going of Him, May his passage cleanse the world. May He keep the world for His people." -Liet Kynes