Golden Osiris slot by Play'n Go is a 7x7 cascading video slot game.
Wins are achieved by getting 5 or more symbols in clusters. These are removed and new symbols fill up the grid. Cascades continue until no more wins can be created.
All wilds are hidden underneath the highlighted symbols and can be uncovered by winning clusters. Once a wild is uncovered, it moves forward onto the grid and cascades with the other symbols normally. Wilds may have x2, x3, x4, x5, x7 and x10 win multipliers. Where a win includes more than one multiplier, only the highest one is applied. Up to 6 wilds are added underneath the grid on each new cascade.
From Play N Go