Ghostly Flicker in hand or in your library (on top of your library).
All permanents on the battlefield.
Easy Prerequisites
You control three additional Islands.
Steps
Activate
Mystic Sanctuary and
Brass Infiniscope by tapping them, adding .
Cast
Ghostly Flicker either from your hand or from the top of your library by paying .
Elsha's prowess ability triggers, giving it +1/+1 until end of turn.
Resolve
Ghostly Flicker, blinking
Mystic Sanctuary and
Brass Infiniscope.
When
Mystic Sanctuary enters untapped, it triggers, putting
Ghostly Flicker from your graveyard onto the top of your library.
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 artifact ETB.
Infinite artifact LTB.
Infinite card draw.
Infinite landfall triggers.
Infinite magecraft triggers.
Infinite storm count.
Infinitely large creature until end of turn.
Near-infinite lifegain.
Near-infinite lifegain triggers.
Infinite draw 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.