This mesmerizing loop locks down the stack by turning a single counterspell into an overwhelming tidal wave of Merfolk. When you tap seven untapped Merfolk to activate Lullmage Mentor and counter an opponent's spell, Lullmage Mentor's own triggered ability fires back, seeing a spell you control counter theirs. That single token generation is then catastrophically multiplied by Doubling Season, Adrix and Nev, Twincasters, and Ojer Taq, Deepest Foundation—compounding to flood your board with a dozen fresh bodies every single time. Because you only need seven of those newly minted creatures to pay the tapping cost again, you instantly have enough fodder to counter the next spell and repeat the sequence indefinitely.