Heosvarog the Mechanical Dawn (ROTA-EN035)

2 LIGHT Machine monsters
If this card is Fusion Summoned: You can activate this effect; during the Standby Phase of the next turn, add 1 card from your GY to your hand, with an effect that Fusion Summons a monster(s). When your opponent activates a Spell/Trap Card or effect (Quick Effect): You can banish 1 face-up LIGHT Machine monster you control or 2 LIGHT Machine monsters from your GY; negate the activation. You can only use each effect of "Heosvarog the Mechanical Dawn" once per turn.