Threefold Thunderhulk without a -1/-1 counter on it).
Steps
Activate
Grinding Station by sacrificing
Threefold Thunderhulk.
When
Threefold Thunderhulk dies, its persist ability triggers, returning it from your graveyard to the battlefield without a -1/-1 counter on it due to its replacement effect.
When
Threefold Thunderhulk enters,
Grinding Station triggers, untapping itself.
Resolve the
Grinding Station ability from step 1, causing target player to mill three cards.
Repeat.
Results
Infinite creature ETB.
Infinite creature LTB.
Infinite creature tokens.
Infinite death triggers.
Infinite mill.
Infinite creature sacrifice triggers.
Infinite self-mill.
Infinite artifact ETB.
Infinite artifact LTB.
Infinite artifact sacrifice triggers.
Metadata
Bracket tag
SpicyBracket 3-4+
Probably 3 or 4, but hard to classify
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.