
Nivix Cyclops | Creature | Cyclops | Defender
Whenever you cast an instant or sorcery spell, Nivix Cyclops gets +3/+0 until end of turn and can attack this turn as though it didn't have defender. | Wayne Reynolds

Stormchaser Mage | Creature | Human Wizard | Flying, haste
Prowess (Whenever you cast a noncreature spell, this creature gets +1/+1 until end of turn.) | Clint Cearley

Frostburn Weird | Creature | Weird | {U/R}: Frostburn Weird gets +1/-1 until end of turn. | Mike Bierek

Keranos, God of Storms | Legendary Enchantment Creature | God | Indestructible
As long as your devotion to blue and red is less than seven, Keranos isn't a creature.
Reveal the first card you draw on each of your turns. Whenever you reveal a land card this way, draw a card. Whenever you reveal a nonland card this way, Keranos deals 3 damage to any target. | Daarken

Chromanticore | Enchantment Creature | Manticore | Bestow {2}{W}{U}{B}{R}{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.)
Flying, first strike, vigilance, trample, lifelink
Enchanted creature gets +4/+4 and has flying, first strike, vigilance, trample, and lifelink. | Min Yum