When you play Eilyn, she gets Aegis.
Summon: Stun an enemy unit. It stays stunned while you have Daraka.
Aegis - Aegis protects a unit or player from one enemy spell or effect. It doesn't block friendly effects, nor does it stop battle damage from Killer attacks, Relic Weapons, or normal attack and blocking.
Overwhelm - A unit or spell with Overwhelm will deal any excess damage to your opponent on your turn (does not work while blocking).
Summon - Does something when played
Stun - Exhaust a unit. It can't attack or block next turn.