Delirium is a cool mechanic from back in Shadows over Innistrad that was designed as a modern version of threshold
2) Magus Lucea Kane: X-spells, but louder Magus Lucea Kane is for anyone who has ever looked at an X spell and thought, What if it happened twice? She taps for two colorless, and then sets up a delayed copy effect: the next time you cast a spell with X in its mana cost or activate an ability with X in its activation cost that turn, copy it
(2024-09-20) If you choose to pay the impending cost rather than the mana cost, you're still casting the spell
Be wary when proliferating yourself versus that Vishgraz, the Doomhive deck
Until your next end step, you may play that card
Proactive Spellslinger decks would usually run more copy spells (like Doublecast) and direct damage, but fewer counterspells