well if u want them to "rise" they will have to keep rising and they will never fall down
gravity can only go in 1 direction you know >.> i declare that your mod idea will be impossible, until 3.3
also isnt there already a lightningfighter joust?
that's the thing which is impossible for a moment. If i lower the lava, i cannot control it's speed. Gravity on the other hand will cause it to lower and thus, the lava will not rise