Laevateinn, the Demon Sword (World2017-004) [Promo Cards] H15 you may return that card

you may return that card to your hand

[AUTO] [CXCOMBO] [Put 1 card from your hand into your waiting room] When this card attacks

the number of cards put from the top of your deck into your waiting room by the [CXCOMBO] effect of your other "Aang: Master of All Elements" gets +1

or return target resonator to its owner's hand

Set: Celebrations: 25th Anniversary - Classic Collection Type: Lightning Rarity: Ultra Rare Retreat cost: Colorless

Laevateinn, the Demon Sword (World2017-004) [Promo Cards] H15 you may return that cardSet Name: Promo Cards Release Date: TBA Rarity: Promo Card Type: Regalia Your J Ruler gains [Swiftness]. Rest: Until end of turn, if your J ruler would deal damage, it deals that much +200 damage instead. As long as your J ruler is "Melgis, the One Charmed by the Demon Sword", it gains [Imperishable] until end of turn and you may pay 2 less to play it's God's Art abilities this turn. Banish a resonator : Recover this card. Discard this card : Produce