Jotun Spellhammer

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 attacking and blocking.

Depleted - Isn't usable the turn it is played.

Inscribe - Can be played as the card itself, or as a depleted power of the appropriate faction. This still counts towards your one power for the turn.