Aetherstorm Roc [Kaladesh Prerelease Promos]

Aetherstorm Roc [Kaladesh Prerelease Promos]Set: Kaladesh Prerelease Promos Type: Creature Bird Rarity: Rare Cost: {2}{W}{W} Flying Whenever Aetherstorm Roc or another creature enters the battlefield under your control, you get {E} (an energy counter). Whenever Aetherstorm Roc attacks, you may pay {E}{E}. If you do, put a +1 +1 counter on it and tap up to one target creature defending player controls.

If both targets are still legal as this ability resolves

Whenever Midnight Entourage or another Aetherborn you control dies

Set: Magic 2010 Type: Artifact Rarity: Rare Cost: {5} {T}

But Gideon's right: we're also the ones who can choose to stay

Set: Fate Reforged Prerelease Promos Type: Creature — Human Monk Rarity: Mythic Cost: {1}{W} Lifelink

When Dimir Aqueduct enters the battlefield

Set: Champions of Kamigawa Type: Legendary Enchantment — Shrine Rarity: Uncommon Cost: {3}{W} At the beginning of your upkeep

Set: Duel Decks Anthology Type: Sorcery Rarity: Rare Cost: {2}{B}{B} All creatures get -1/-1 until end of turn for each Swamp you control

{1}: Target colorless creature gains haste until end of turn

Predators try to separate the young

Goblins Type: Creature — Elf Avatar Rarity: Uncommon Cost: {3}{G} Trample

Set: Aether Revolt Type: Artifact Rarity: Rare Cost: {3} Nonartifact spells you cast have improvise