Powerup draft: Before each match, each player picks 2 powerups. Using a powerup uses your turn — you don't also place a mark.
🔥 Fireball — Clears all marks in a 4×4 area. Only on boards ≥8×8.
🛡️ Shield — Protect one of your marks for 3 turns.
🧊 Freeze — Skip an opponent's next turn.
👻 Ghost — Place an invisible mark (reveals after 2 rounds).
🔄 Swap — Swap two adjacent marks (within 2 cells).
Ultimate Mode: The board is split into sub-boards. Where you place your mark forces the next player to play in that sub-board. Win sub-boards to claim them, then win a line of sub-boards.