I mashed enough buttons on the arcade cabinet enough during Teenage Mutant Ninja Turtles to earn an emote, so maybe you'll discover the next one and brag about it on the Draftsim Discord, then others can enjoy the fun goodies
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
When it enters, creatures get -X/-X, which can wipe tokens or shrink larger threats into range
Regeneration was never a card played much
Just note that all of your tokens created with replacement effects will enter tapped, just like the original