Entermage Flame Eater
When an effect that would inflict damage to you is activated: You can Special Summon this card from your hand, and if you do, you take no damage from that effect. You cannot Special Summon monsters, except “Entermage” monsters for the rest of this turn. If summoned this way, banish this card when it leaves the field.
If this card is Normal or Special Summoned: Inflict 500 damage to both players