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If I have, lets say, Exploration in play, and Ive already played my two lands in a turn, blinking Exploration wont raise the 2-land limit per turn to three

P/T Number 191 Language English Legal Formats Commander, Legacy, Modern, Vintage Not Legal Formats Alchemy, Brawl, Competitive Brawl, Historic, Pauper, Pioneer, Standard, Timeless Rulings (1/12/2024) Izzet Guildmage's abilities can copy any instant or sorcery spell with an appropriate mana value, not just one with targets

Love it much for the formats we care about

Deaths Shadow, Liliana of the Veil, Blood Moon, Leyline of the Void, and Omnath, Locus of Creation all get cleanly answered by Purge, so I expect this to be a mainstay in the sideboards of White decks regardless of what the metagame looks like

For three mana, Bruvac is a Blue 1/4 that simply doubles the number of cards your opponents mill when they do so

Nev himself gets X +1/+1 counters when you cast a spell with X in its mana cost, where X is the amount of mana put into the spells X cost