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Chain bola - attaches to one target explodes and then goes after another target. Higher rank increases the # of chains

Instead of exploding, the bola continually drains the HP until they are dead.

Explosion causes a splash radius with fire on the ground to burn other enemies

Bola wraps up to three targets together and then explodes

Continuing with the rune effects, we move the Demon Hunter on with:

Bola Shot - Shoot out an explosive Bola that wraps itself around its target. After X seconds the Bola explodes, dealing a percentage of weapon damage to the target and an additional percentage of weapon damage to all nearby targets.