Bloodspill Invocation (Blue) (Unlimited)
(Aura's stay in the arena until they are destroyed.)
When an attack action card you control hits, destroy Bloodspill Invocation then create 1 Runechant token. (It's an aura with "When you play an attack action card or attack with a weapon, destroy Runechant and deal 1 arcane damage to target opposing hero.")
When your hero is dealt damage, destroy Bloodspill Invocation.