Exact Rune Duel

Defeat guardians with exactly 8, 16 and 32 rune power at the central altar. Select a rune and tap a neighboring empty cell to walk, or an equal rune to fuse at the destination. Every walk or fusion costs one heart. Fusion opens the guardian’s ward, but walking closes it again: the final action before Strike should fuse the exact required rune on the altar. Strike consumes that rune, defeats the guardian and restores four hearts, up to eight. Unequal runes block each other. There is no new supply, so preserve enough material for all three exact strikes and build the final pair around the altar instead of dragging a finished weapon there. Keyboard: Tab and Enter/Space operate buttons; R restarts.