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So you can do this at any time, transferring the +1/+1 counter and the Buster Sword to Cloud

Which fits

Notably, older cards such as Moonmist that instruct a player to transform permanents don't affect permanents with daybound or nightbound

Narset of the Ancient Way is probably the best option: while she incentivizes casting spells over cycling them, her minus ability allows you to draw extra cards with the option to discard them to damage your opponents creatures, or to keep them and cycle them later

On the other hand, a card that does nothing but sit around in your hand is the last thing you want, especially in Draft