You can only use this effect of "Invoked Augoeides" once per turn
Monster Effect: When an opponents monster declares an attack: You can place this monster in your Pendulum Zone, and if you do, return the opponents monster to the hand
I especially like how much control you have over when this transforms because it only triggers off spells that cost 4 or more, or you can put counters on the Emperor so you just need to trigger it once or twice to flip
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You can revive Thor with Bursti in the GY
Up to two creatures from your graveyard, not to your hand, (like Death's Duet) but to the battlefield