All permanents in hand or on the battlefield or in exile (Exiled by the creature on the battlefield).
Easy Prerequisites
Changeling Hero must be exiled by
Changeling Titan, and
Changeling Berserker must begin in hand.
(This starting order is not fixed, and their initial positions may be interchanged as necessary.).
Mana Needed
plus the mana cost of the creature in your hand available.
Steps
Cast
Changeling Berserker for its mana cost.
When
Changeling Berserker enters, it exiles
Changeling Titan until
Changeling Berserker leaves the battlefield. Resolve any additional effects of
Changeling Berserker's ETB.
When
Changeling Titan leaves the battlefield,
Changeling Hero is returned from exile to the battlefield.
When
Changeling Hero enters, it exiles
Changeling Berserker until
Changeling Hero leaves the battlefield. Resolve any additional effects of
Changeling Hero's ETB.
When
Changeling Berserker leaves the battlefield,
Changeling Titan is returned from exile to the battlefield.
When
Changeling Titan enters, it exiles
Changeling Hero until
Changeling Titan leaves the battlefield. Resolve any additional effects of
Changeling Titan's ETB.
When
Changeling Hero leaves the battlefield,
Changeling Berserker is returned from exile to the battlefield.
Repeat from step 2.
Notes
Due to differences in card templating between the various banisher effects (linked triggered abilities vs "until" clause), steps 3, 5, and 7 may return the creature to the battlefield during the resolution of the preceding step rather than creating a separate event. This should not affect the overall execution of the combo, only how many objects pass through the stack (and thus rounds of priority available per loop).
Results
Infinite creature ETB.
Infinite creature LTB.
Metadata
Bracket tag
ExhibitionBracket 1+
For any deck
1
2
3
4
5
1 · Exhibition5 · cEDH
Bracket tags are estimated from the cards and results of each combo, as a guideline rather than a strict classification.