Granth, King of the Beasts

Trample
Other Beasts you control get +1/+1 and trample.
Assistance — As long as you control another
creature that shares one of its original creature
types with Granth, King of the Beasts, all
non-Beast creatures you control are Beasts.
"As soon as you see it, your primal instincts go wild.
It's, well, horrifying..."