Floodtide Serpent | Creature | Serpent | Floodtide Serpent can't attack unless you return an enchantment you control to its owner's hand. (This cost is paid as attackers are declared.) | Steven Belledin
Perplexing Chimera | Enchantment Creature | Chimera | Whenever an opponent casts a spell, you may exchange control of Perplexing Chimera and that spell. If you do, you may choose new targets for the spell. (If the spell becomes a permanent, you control that permanent.) | Tyler Jacobson
Siren of the Fanged Coast | Creature | Siren | Flying
Tribute 3 (As this creature enters the battlefield, an opponent of your choice may put three +1/+1 counters on it.)
When Siren of the Fanged Coast enters the battlefield, if tribute wasn't paid, gain control of target creature. | Michael C. Hayes
Sphinx's Disciple | Creature | Human Wizard | Flying
Inspired — Whenever Sphinx's Disciple becomes untapped, draw a card. | Ryan Alexander Lee
Phenax, God of Deception | Legendary Enchantment Creature | God | Indestructible
As long as your devotion to blue and black is less than seven, Phenax isn't a creature.
Creatures you control have "{T}: Target player mills X cards, where X is this creature's toughness." | Ryan Barger
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