Kilo, causing you to proliferate and put an eon counter on
Magosi.
Activate
Nesting Grounds' second ability by paying ({1} magic symbol) and tapping it, moving an eon counter from
Magosi onto
Nesting Grounds.
Activate
Magosi's third ability by tapping it, removing an eon counter from it and returning it from the battlefield to your hand, causing you to take an extra turn after this one.
Play
Magosi.
Move to your next turn.
Tap
Kilo by any method, triggering
Kilo, causing you to proliferate and put an eon counter on
Nesting Grounds.
Activate
Nesting Grounds' second ability by paying ({1} magic symbol) and tapping it, moving an eon counter from
Nesting Grounds onto
Magosi.
Repeat from step 3.
Notes
If the method you are using to tap
Kilo has additional costs, you will also need to pay those costs each turn in addition to the ({1} magic symbol) needed to activate