Mischievous Pup

Flash is the whole trick: a 3/1 whose fragility would make it a poor attacker if it landed at sorcery speed becomes a reset button you hold up on the opponent's end step or in response to their removal. The bounce trigger reads as generic value at first pass, but the "permanent you control" scope is deliberately wide. It can pull one of your own creatures out of the way of a targeted kill spell mid-combat, pick up a permanent whose enters-the-battlefield effect you want a second time, or return a utility creature to hand so you can recast it for another trigger. Because the return rides the entry rather than a separate activation, the flexibility comes bundled with a body that can attack the following turn, and the flash timing lets you deploy the package at instant speed. The "up to one" clause matters here: with no target worth choosing, it simply arrives as a creature and nothing more, so it never strands you into a bounce you do not want, the way a mandatory return would. This is a modern tuning of a very old white template, the flash-priced blink-adjacent effect welded to a fair body, with the design putting all the payoff in how you sequence the trigger rather than in the numbers on the card.