Steel Leaf Champion

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

Elvish Mystic

Slaughterhorn

Bloodrush — {G}, Discard Slaughterhorn: Target attacking creature gets +3/+2 until end of turn.

Boon Satyr

Flash
Bestow {3}{G}{G} (If you cast this card for its bestow cost, it's an Aura spell with enchant creature. It becomes a creature again if it's not attached to a creature.)
Enchanted creature gets +4/+2.

Forest

Llanowar Elves

Fyndhorn Elves

Keen-Eyed Curator

As long as there are four or more card types among cards exiled with Keen-Eyed Curator, it gets +4/+4 and has trample.
{1}: Exile target card from a graveyard.

Carnage Tyrant

This spell can't be countered.
Trample, hexproof