Here's how the mechanic worked as handed off from Vision Design: Warp COST (You may cast this spell from your hand for its warp cost during your precombat main phase
3 Narset Transcendent Narset Transcendent is the perfect support card for decks playing a lot of noncreature spells
Madrush Cyclops Madrush Cyclops is a simple yet effective way to give your creatures haste for just 4 mana
Lathliss, Dragon Queen is downright disgusting with Terror of the Peaks
Check the rules beforehand as timings/games might be different, but tournament organizers should tell everyone before starting
Gimmicky planeswalkers are ones that have a twist to them, only having negative abilities, maybe being an uncommon walker, a nonlegendary one, one centered around only zeroes, one that transforms, one that has a plus that can get it to an ult directly by adding loyalty counters, etc