Sinking Feeling + Hex Parasite + Kiora's Follower + Chromatic Orrery

Sinking Feeling

Hex Parasite

Kiora's Follower

Chromatic Orrery

How it works

1. Activate Chromatic Orrery's first ability by tapping it, adding 5.
2. Activate Kiora's Follower by tapping it, untapping Chromatic Orrery.
3. Activate Kiora's Follower by paying 1 and putting a -1/-1 counter on it, untapping it.
4. Activate Hex Parasite by paying 2, removing the -1/-1 counter from Kiora's Follower and giving Hex Parasite +1/+0 until end of turn.
5. Repeat.
6. Once you have infinite mana, you may instead use Chromatic Orrery's first ability to draw infinite cards.

This loop relies on a clever self-correcting engine built around Kiora's Follower, which is enchanted by Sinking Feeling so it can untap itself using its own activated ability. To fuel this untap cost without letting the creature wither away to nothing, Hex Parasite steps in to devour the -1/-1 counters for a mere two life per iteration. Meanwhile, Chromatic Orrery provides the massive mana production needed to pay for the parasite's ability while simultaneously ensuring all that generated colorless mana can be filtered into any color you need. Once the loop is churning out infinite mana, you can finally pivot that same engine into Chromatic Orrery's second ability to draw your entire deck.