Doctor Otto Octavius

Whenever Otto enters the battlefield, create four 3/4 colorless Arms artifact creature tokens with "If you control 5 or more Arms, exile all but four Arms you control."
Exile all Arms you control if Otto would leave the battlefield.
{8}, Sacrifice 8 non-Arm artifacts you control: Create a whartifact token Portable Sun with 2 time counters on it and "At the start of your upkeep, you get 8 {e} and {w}."