Reset Button: All of the Dark Signers in the season two finale, excluding Rex and Roman, as they were resurrected and brought back with no memories of their time as Dark Signers
With the Pokmon Scarlet and Violet TCG set, the ex mechanic will now be related to Terastal Forms
By contrast you essentially never cast Boon of the Wish-Giver
Sketch Frame Archon of Cruelty Showcase frames of various kinds wax and wane in popularity, and the sketch style from Modern Horizons 2 tends to be somewhat unpopular
Rush of Knowledge (Onslaught/Legions/Scourge) The common consensus in Onslaught/Legions/Scourge draft was that you wouldn't want to play a deck with more than two colors, since there weren't many cards which allowed you to "mana fix" - that is, fetch a third color of mana
If you thought one copy of Koma, Cosmos Serpent was bad, wait until you see the second