Mairsil, the Pretender | Quicksilver Elemental | Gilded Lotus

(and one other card)

Activate
Mairsil using
Gilded Lotus' ability by tapping it, adding ({U} magic symbol) ({U} magic symbol) ({U} magic symbol) .
Activate
Mairsil using
Staff of Domination's first ability by paying ({1} magic symbol) , untapping it.
Activate
Mairsil using
Quicksilver Elemental's ability by paying ({U} magic symbol) , causing it to gain all activated abilities of itself until end of turn.
Repeat.
If desired, you may use any of
Staff of Domination's other abilities using
Mairsil, and then use
Quicksilver Elemental's ability to use them infinitely.