Aetherstorm Roc | Creature | Bird | 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. | Scott Murphy
Consul's Shieldguard | Creature | Dwarf Soldier | When Consul's Shieldguard enters the battlefield, you get {E}{E} (two energy counters).
Whenever Consul's Shieldguard attacks, you may pay {E}. If you do, another target attacking creature gains indestructible until end of turn. | David Gaillet
Propeller Pioneer | Creature | Human Artificer | Flying
Fabricate 1 (When this creature enters the battlefield, put a +1/+1 counter on it or create a 1/1 colorless Servo artifact creature token.) | Winona Nelson
Thriving Ibex | Creature | Goat | When Thriving Ibex enters the battlefield, you get {E}{E} (two energy counters).
Whenever Thriving Ibex attacks, you may pay {E}{E}. If you do, put a +1/+1 counter on it. | Sidharth Chaturvedi
Visionary Augmenter | Creature | Dwarf Artificer | Fabricate 2 (When this creature enters the battlefield, put two +1/+1 counters on it or create two 1/1 colorless Servo artifact creature tokens.) | James Paick
Restoration Gearsmith | Creature | Human Artificer | When Restoration Gearsmith enters the battlefield, return target artifact or creature card from your graveyard to your hand. | John Severin Brassell