Throne Of Cheddric

The Throne Square is the wild. A cluster of 7 or more leaves a 1×1 square worth ×2, and every square grows after the wins it joins: 1×1 to 2×2 to 4×4 to the full 8×8, swallowing smaller squares and doubling their summed multiplier, up to ×256.

At the start of a spin King Cheddric can hurl his plunger. Wherever it sticks, a fresh 1×1 Throne Square worth ×2 appears. The first free spin of every round always opens with a throw.

While a square is on the board the greedy head can gulp, doubling every square's multiplier. When the tumbles end with no win, the dim head can pull the chain: the squares stay, every other symbol is replaced and the board is checked again.

3, 4 or 5 manholes open 10, 12 or 15 free spins, and 3 more add 5 spins. In free spins the squares stay put from spin to spin, keeping their size and multiplier, and a square that fills the board is the Full Throne.