Mutagenic Growth

({G/P} can be paid with either {G} or 2 life.)
Target creature gets +2/+2 until end of turn.

Satyr Hoplite

Heroic — Whenever you cast a spell that targets Satyr Hoplite, put a +1/+1 counter on Satyr Hoplite.

Target creature you control deals damage equal to its power to another target creature.

Heroic — Whenever you cast a spell that targets Akroan Crusader, create a 1/1 red Soldier creature token with haste.

Enchant artifact or creature
As long as enchanted permanent is a creature, it gets +2/+1.

Trample
Champion of the Flame gets +2/+2 for each Aura and Equipment attached to it.

Target creature gains double strike until end of turn. (It deals both first-strike and regular combat damage.)

Enchant creature
When Dragon Mantle enters, draw a card.
Enchanted creature has "{R}: This creature gets +1/+0 until end of turn."

Heroic — Whenever you cast a spell that targets Arena Athlete, target creature an opponent controls can't block this turn.