Elspeth, Knight-Errant [Secret Lair Drop Series] XY166 As long as Arixmethes has

As long as Arixmethes has a slumber counter on it

Set: Sun & Moon: Guardians Rising Type: Basic Fighting Energy Rarity: Secret Rare

Elfhame Elite attacks

you may sacrifice an artifact

Set: Transformers Type: Legendary Artifact Creature — Robot Rarity: Mythic Cost: {3}{B} More Than Meets the Eye {2}{B} (You may cast this card converted for {2}{B}

Elspeth, Knight-Errant [Secret Lair Drop Series] XY166 As long as Arixmethes hasSet: Secret Lair Drop Series Type: Legendary Planeswalker Elspeth Rarity: Mythic Cost: {2}{W}{W} +1: Create a 1 1 white Soldier creature token. +1: Target creature gets +3 +3 and gains flying until end of turn. 8: You get an emblem with "Artifacts, creatures, enchantments, and lands you control have indestructible."