Ephemerate (Foil Etched) [Strixhaven: Mystical Archive] Friday Night Magic 2013 During battle netween this attacking

During battle netween this attacking card and a Defense Position monster whose DEF is lower than the ATK of this card

you can also Xyz Summon this card by using a "tellarknight" Xyz Monster you control as the Xyz Material

if it's your main phase

Set: Turbo Pack: Booster Two Card type: Quick Play Spell Rarity: Super Rare Attack: 1500 Defense: 1000 Activate only while you control a Spellcaster-Type monster

but it is predictable

Ephemerate (Foil Etched) [Strixhaven: Mystical Archive] Friday Night Magic 2013 During battle netween this attackingSet: Strixhaven: Mystical Archive Type: Instant Rarity: Rare Cost: {W} Exile target creature you control, then return it to the battlefield under its owner's control. Rebound (If you cast this spell from your hand, exile it as it resolves. At the beginning of your next upkeep, you may cast this card from exile without paying its mana cost.)