function use_ring_of_levitation(u, amount)
if u.ship~=nil and amount>0 then
local mallorn = 0
for u2 in u.region.units do
if u2.ship==u.ship then
local i = u2:get_item("mallornseed")
if i>0 then
u2:use_pooled("mallornseed", i)
u2:use_pooled("seed", i)
mallorn = mallorn + i
end
if mallorn>0 then
levitate_ship(u.ship, u, mallorn, 2)
return 0