Tourach's Chant trigger, putting a -1/-1 counter on
Dryad Arbor.
Dryad Arbor dies as a state-based action due to having 0 toughness, triggering its undying ability, returning it from your graveyard to the battlefield with a -1/-1 counter on it.
When
Dryad Arbor enters,
Tourach's Chant and
Marauding Raptor trigger.
Resolve the
Tourach's Chant trigger, putting a -1/-1 counter on
Dryad Arbor.
Resolve the
Marauding Raptor trigger, dealing damage to
Dryad Arbor.
Repeat from step 4.
Results
Infinite creature LTB.
Infinite creature ETB.
Infinite death triggers.
Infinite landfall triggers.
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.