Karn, the Great Creator | Teferi's Talent | Gonti's Aether Heart

(and one other card)

Gonti's Aether Heart in hand.
All other permanents on the battlefield (
Teferi's Talent attached to
Karn).
Piper has power 3 or greater, does not have summoning sickness, and cannot be blocked by an opponent.
Karn has three or more loyalty counters on it.
({8} magic symbol) each turn available.

Cast
Gonti's Aether Heart by paying ({6} magic symbol) .
When
Gonti's Aether Heart enters the battlefield, it triggers, causing you to get ({E} magic symbol) ({E} magic symbol) .
Deal combat damage to an opponent using Piper.
Piper triggers, creating at least three Clue tokens.
When the Clues enter the battlefield,
Gonti's Aether Heart triggers that many times, causing you to get ({E} magic symbol) ({E} magic symbol) for each Clue.
Activate
Gonti's Aether Heart by paying eight ({E} magic symbol) and exiling it, causing you to take an extra turn after this one.
Activate
Karn's second loyalty ability by removing two loyalty counters from it, putting
Gonti's Aether Heart from exile into your hand.
Activate a Clue by paying ({2} magic symbol) and sacrificing it.
Piper triggers, putting a +1/+1 counter on a creature you control.
Resolve the Clue ability, causing you to draw a card.
Teferi's Talent triggers, putting a loyalty counter on
Karn.
Move to your next turn.
During your draw step, you will draw a card. When you do,
Teferi's Talent triggers, putting a loyalty counter on
Karn.
Repeat.