Pentavus's first ability by paying and removing a +1/+1 counter from it, creating a 1/1 Pentavite creature token.
Activate
Pentavus's second ability by paying and sacrificing the Pentavite.
When the Pentavite dies,
Dross Scorpion triggers, untapping
Brass Infiniscope.
Resolve the
Pentavus ability, putting a +1/+1 counter on it.
Repeat.
Notes
Each activation of
Brass Infiniscope adds a delayed triggered ability that can draw you cards and gain life if you cast a spell with in its cost. If you wish to use these abilities, you'll want to stop the combo before getting too many triggers such that you'll deck yourself and lose the game. To gain life, you must spend at least for X when casting the spell.
Results
Infinite creature ETB.
Infinite creature LTB.
Infinite card draw.
Infinite death triggers.
Infinite creature sacrifice triggers.
Near-infinite lifegain.
Near-infinite lifegain triggers.
Infinite draw 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.