Passable Block card, and nice to have retain on defensive cards sometimes! I don't take it unless it's common for me to have Osty survive incoming damage in fights though.
Very good Osty HP for one mana with the added benefit of Retain. To get the most of this Osty must lose HP without dying, so other Summon effects are needed alongside this.
Retain. Deal 8 damage to ALL enemies.
Whenever you play an Ethereal card, gain 4 Block.
Retain. Summon 3. Osty heals 5 HP.
Osty deals 25 damage. Deals 5 additional damage for ALL your other Osty Attacks.
