Steel Leaf Champion

Steel Leaf Champion can't be blocked by creatures with power 2 or less.

Llanowar Elves

Grothama, All-Devouring

Other creatures have "Whenever this creature attacks, you may have it fight Grothama, All-Devouring."
When Grothama leaves the battlefield, each player draws cards equal to the amount of damage dealt to Grothama this turn by sources they controlled.

Prowling Serpopard

This spell can't be countered.
Creature spells you control can't be countered.