Invoked [Cost: 1] - When invoked, this rune conjures a sandstorm at the point of invocation that heavily obscures the area within a 20 ft. radius. The sandstorm spreads around corners, and creatures that start their turn within it must make a Constitution saving throw or take 1d4 slashing damage. This effect lasts up to 10 minutes.

Scribed [Cost: 2] - When scribed on an object or surface, a number of cubic feet of material of the object or surface is transmuted into sand, collapsing into fine particles that retain their other properties, such as color and weight. If the sand is on the ground, and a creature ends their turn standing on it without moving on their turn, they sink 5 ft. into the sand, and their movement speed becomes 0. A trapped creature can use its action to make a DC 13 Athletics check to attempt to free themselves, climbing 5 ft. on a success. A creature that sinks more than 5 ft. into the sand begins to suffocate and must make a DC 13 Constitution saving throw at the start of each of its turns, gaining a level of Exhaustion on a failed saving throw. This rune cannot be scribed on metal or creatures.

Synthesis [Cost: 1] - Combining this rune with a rune that has an area of effect allows you to double the area of effect at the cost of halving any damaging effects the rune causes. If the rune has no damaging effects, halve the duration instead.