Riela, Arcane Innovator

Whenever you cast an instant or sorcery spell
that's a copy of another spell, you may draw a
card. If you do, discard a card.
{u}{r}, Exile an instant or sorcery card from your
graveyard: Create a token that's a copy of the
exiled card. You may cast the token without
paying its mana cost. Exile it at the beginning of
the next end step.
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