Supreme Leader Amiya

When Supreme Leader Amiya enters the battlefield, you may choose any Amiya card from outside the game and put it on the battlefield with an Originium counter.
{2}{t}: Switch Amiya with any other Amiya card from outside the game. Use only as a sorcery and only once per turn.
After switching, put an Originium counter on Amiya.

If either Amiya or Supreme Leader Amiya is not present on the battlefield during your end step, put the other in its owner's graveyard.