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Fishborg Launcher is especially useful in this area since it doesnt require any resources from your hand or field to summon from the Graveyard.

Time Warp is the best for its mana cost, Temporal Mastery makes your early game more explosive and is fine late, Walk the Aeons allows you to chain together multiple turns off one card when you need it, Temporal Trespass can be absolutely clutch when you need to both Time Walk and play another Howling Mine effect, and Part the Waterveil is your win condition

After you use this effect 3 times, destroy this card

This is less likely to happen for "Metalflame Swordsman" due to the greater quantity of search targets