Snow Sloth Mutation

Trample, reach
Snow Sloth Mutation's power and toughness are
equal to X.
When Snow Sloth Mutation enters the
battlefield, choose target opponent. That
opponent's maximum life is 20.
"They turned out to help the snow people a lot. Think
of them as wagons only they're dangerous and larger."
— Bracious, Warlord of the Snow People