All permanents in hand or on the battlefield or in exile (Exiled by the creature on the battlefield).
Easy Prerequisites
Phantom Steed must be exiled by
Changeling Titan, and
Wormfang Drake 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
Wormfang Drake for its mana cost.
When
Wormfang Drake enters, it exiles
Changeling Titan until
Wormfang Drake leaves the battlefield. Resolve any additional effects of
Wormfang Drake's ETB.
When
Changeling Titan leaves the battlefield,
Phantom Steed is returned from exile to the battlefield.
When
Phantom Steed enters, it exiles
Wormfang Drake until
Phantom Steed leaves the battlefield. Resolve any additional effects of
Phantom Steed's ETB.
When
Wormfang Drake leaves the battlefield,
Changeling Titan is returned from exile to the battlefield.
When
Changeling Titan enters, it exiles
Phantom Steed until
Changeling Titan leaves the battlefield. Resolve any additional effects of
Changeling Titan's ETB.
When
Phantom Steed leaves the battlefield,
Wormfang Drake 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.