Lancelot, the Knight of Mad Demon (World2016-004) [Promo Cards]

[Swiftness] (This card can attack and you can play its Rest abilities the same turn it enters a field.) As you choose a card to attack, you must choose this card if able. Whenever this card attacks, if this card's ATK is 1000 or more, this card deals 700 damage to target resonator. R: This card gains [+100/+0] until end of turn.