Rionya, Fire Dancer

Copy effects and spellslinging usually pull in opposite directions: most copies are one-shot instants, and most spell-count payoffs reward the wrong permanent types. This design welds them at the combat step, minting hasty copies of a chosen creature scaled by the instants and sorceries you've already cast that turn. The baseline is one copy for free, so the trigger does something even on a turn you cast nothing, but the ceiling climbs with every burn spell or cantrip you chain first. What keeps it from spiraling into a permanent army is the exile clause at the next end step: these are attack-and-vanish bodies, so the payoff is combat damage and enter-the-battlefield value rather than a growing board. That timing reshapes what you want to copy. A vanilla beater is fine, but the copies also stack whatever triggers the target carries, so the sharper builds point it at creatures whose enter-the-battlefield or attack triggers matter more than their stats: a copy that draws a card or drains life on the way in loses nothing when it's exiled at end of turn. The result is a card that asks you to sequence a whole turn (spells first, combat trigger second, alpha strike third) rather than deploy a threat and pass, a genuinely different rhythm from the usual red aggression.