fates collide pokemon cards XY: Pokemon X Fates Collide - Pokemon Card

Soul-Guide Lantern often fills a similar role and has the bonus of value on entry (in some cases)

If Raging Battle Mouse was the first spell you cast this turn, the next spell you cast this turn is your second spell

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This won't touch generic mana costs or other colors, and it only works on permanents, which was clearly done to keep them from getting broken by casting free Brainstorms, counters, Lightning Bolts, Swords to Plowshares, etc

If the battlefield is clear, then either of her +1s will be effective, depending on if you have a spell to cast for RR