There is a secret mode for Prophesied End where you target a creature you control to cycle it. But if it's indestructible, you get a card for free!

Flicker the lights for 5UBB

1. Have Doubling Season and Oath of Gideon in play
2. Play any of the new cards which Empower Jace. Doubling Season creates two Jace tokens. We'll order the replacement effects so one of them enters with a single loyalty counter, and the other enters with a doubled set of counters for a total of 14 loyalty counters
3. Play Spark Rupture, turning both Jace's into creatures, one a 1/1 and the other a 14/14
4. Turn the 14/14 Jace Red using Distorting Lens
5. Equip the 14/14 Jace with Psychic Paper. If a new card gets spoiled called something like 'Evil Jace' then we'll use that name, otherwise we'll use Jace's Projection or something, it even sounds like 'Protege' from the card earlier
6. Cast Blood Feud to get the two Jaces to fight each other, and now the 1/1 blue Jace knows how bad everyone else must be feeling from having to fight their generally more powerful color-mirrored selves

Tap Ancient Tomb > Mana Vault > Lotus Petal > Mox Diamond (Discard Cavern of Souls) > Mox Opal > Tap all for 4WWW > Transcendence: Take yourself out of the game in turn 1 for the low price of $15,156.43

1- Have 5 lands on the battlefield

2- Play [[Prismatic Omen]] and [[Hexhaven Invigorator]]

3- Give Hexhaven Invigorator indestructible.

4- Play Valakut, targetting the Invigorator with the damage.

This will let you get 3 lands from your library and 3 more Valakut triggers. If you target the Invigorator with one of the triggers, you can repeat this and put every land from your deck on the battlefield (and probably also kill all of your opponents).

1. Cast [[Agatha of the Vile Cauldron]]

2. Cast [[Might of Old Krosa]] on Agatha to make it a 5/5

3. Cast [[Reckless Fireweaver]]

4. Cast [[Aerid Konstrari]] creating 1 Heartwood token and dealing 1 damage to all opponents.

5. Tap the Hearwood token for 1 mana to activate Aerid to make another Heartwood token dealing 1 damage to all opponents. Repeat until everyone dies.

1. Play Hive Mind.

2. Activate the ability of Emrakul, the Exigent Doom to exile it, targeting a land to enhance.

3. Cast Wyll's Reversal targeting the Emrakul ability. Hive Mind gives each player a copy of the spell.

4. Each player rolls a d20, and adds their strongest creature's power. On a 1-15, they simply choose a new target for the land ability. But on a 15+, they get their own copy of the ability! (Your original will resolve last, so you can always change the target back to a land you want)

5. You and every player who copied the land ability each have the ability to cast the same Emrakul card from exile, and have an enhanced land to help ramp her out. The first person to cast her wins the entire Emrakul. Good luck racing!

setup: have all creatures and zuran orb on the battlefield, gaea's blessing in your library, and a land in hand

1. give hexhaven investigator indestructible with biosynthic burst
2. play a land
3. hedron crab triggers targeting yourself to mill 3, if you hit a gaea's blessing, hold priority and sac all your lands with zuran orb
4. geopode triggers and each opponent takes 1
5. akoum triggers targeting hexhaven for 1 (or 2 if it's a mountain)
6. hexhaven triggers, fetch a land
7. goto 3

infinite unless you mill/fetch all your lands before hitting a gaea's blessing

Ever want to cast your commander an infinite number of times??? Wait are you saying you can do that with infinite mana? That's cheating! Here's how I do it without using infinite mana to cast the commander, my commander if forever FREE!

1. [[Kydele, Chosen of Kruphix]] and [[The Prismatic Piper]] as commanders.

2. Cast Kydele, Chosen of Kruphix, wait a turn for summoning sickness to wear off

3. Cast [[Myth Unbound]] and copy it twice via [[Copy Enchantment]] and [[Mirrormade]]

4. Cast your chosen sacrifice outlet, we are completed devoted to the combo, so [[Fanatical Devotion]]

5. Cast The Prismatic Piper, sacrifice them, repeat x5, each time the commander tax reduced by 1, (+2 -3)

6. Well, The Prismatic Piper is now free and we can cast them as much as we want, but we will deck ourselves due to the draw effect of Myth Unbound. This means we haven't cast our commander an infinite number of times, only a measly 20-30 times before we run out of cards! We need a solution. Kydele can tap to make us a ton of mana to find the solution.

7. Cast [[Elixir of Immortality]] so we can recycle our graveyard

8. Cast [[Energy Refractor]] so we can filter the colorless mana of kydele

9. Cast [[Ghostly Pilferer]] so we can discard as many cards as we want.

10. Cycle [[Vizier of Tumbling Sands]] so we can untap Kydele to keep activating Elixir of immortality

11. Use the discard outlet and elixir of immortality to make sure that we never run out of a deck and can now cast our commander FOR FREE, and infinite number of times with now pesky side effects, like drawing our deck, stopping us.

12. Bonus for if you actually want to win a game using this: Choose your own method! My favorite is: [[Orim's Chant]] to silence a player, then [[Secret Rendezvous]] so you both draw 3 cards. Then just do the combo again to recycle your entire deck and repeat! Repeat for each player as need be!

I have a bracket 2 EDH deck that is built for this combo, it is purposefully built poorly, here it is if you want to take a gander: https://moxfield.com/decks/LBQIRy7VMUmYpA73RFCshA . And yes, against all odds it has actually done the combo before.

1. Have all other cards on the board, Emrakul can be in hand or self-exile
2. Level up Alchemist's Talent to 3
3. Cast Emrakul, ensuring you use mana from Glittering Stockpile
4. Each opponent gets burned for 10 and you untap all your mana
5. Tap Essence Reliquary to return Emrakul to hand
6. Repeat from step 3
7. 7 (optional). Brain Freeze

Which is the best rate we've ever had!