
Master of Waves | Creature | Merfolk Wizard | Protection from red
Elemental creatures you control get +1/+1.
When Master of Waves enters, create a number of 1/0 blue Elemental creature tokens equal to your devotion to blue. (Each {U} in the mana costs of permanents you control counts toward your devotion to blue.) | Karl Kopinski

Murmuring Mystic | Creature | Human Wizard | Whenever you cast an instant or sorcery spell, create a 1/1 blue Bird Illusion creature token with flying. | Mark Winters

Niblis of Frost | Creature | Spirit | Flying
Prowess (Whenever you cast a noncreature spell, this creature gets +1/+1 until end of turn.)
Whenever you cast an instant or sorcery spell, tap target creature an opponent controls. That creature doesn't untap during its controller's next untap step. | Josu Hernaiz

Opal Lake Gatekeepers | Creature | Vedalken Soldier | When Opal Lake Gatekeepers enters, if you control two or more Gates, you may draw a card. | Arif Wijaya

Archaeomancer | Creature | Human Wizard | When Archaeomancer enters, return target instant or sorcery card from your graveyard to your hand. | Zoltan Boros

Thunderclap Wyvern | Creature | Drake | Flash (You may cast this spell any time you could cast an instant.)
Flying
Other creatures you control with flying get +1/+1. | Jason Felix

Ephara, God of the Polis | Legendary Enchantment Creature | God | Indestructible
As long as your devotion to white and blue is less than seven, Ephara isn't a creature.
At the beginning of each upkeep, if you had another creature enter the battlefield under your control last turn, draw a card. | Eric Deschamps

Notion Thief | Creature | Human Rogue | Flash
If an opponent would draw a card except the first one they draw in each of their draw steps, instead that player skips that draw and you draw a card. | Clint Cearley