BLink-slash spell help

BLink-slash spell help

How can you make a spell that randomly blinks 3 times, slashing random enemies (close to the triggering unit) for critical dmg, then 6 times, then 9 times (respectively in spell lvl)?

That is simple, all you need is a targeted spell and then do this:
action1: move(instantly) casting unit to target unit of abiltiy being cast
action2: select 1 random unit in range and instantly move casting unit to it and deal dmg

Then you just need to expand it to as high as you need