Testing Magician in Sandbox mode I observed that without any upgrades his Ultimate would allow me to shoot 5 bolts if those arrows killed the 2 Seven Bots I spawned in. When fully upgraded I was able to shoot 10 bolts if I killed four Bots.
Attached is the steam recording from when I discovered...
3 matches in a row:
22483920
22479858
22469739
I decided to try and play with the character I never played before, so yeah, the team would be at a disadvantage, but all these 3 matches were cumrbstomps, I literally was unable to do anything.