Great Whale + Shrieking Drake + Mirror Room // Fractured Realm

Great Whale

Shrieking Drake

Mirror Room // Fractured Realm

How it works

1. Activate up to seven lands by tapping them, adding at least 2.
2. Cast Great Whale by paying 5.
3. When Great Whale enters the battlefield, it triggers twice.
4. Resolve the first trigger, untapping up to seven lands.
5. Holding priority, activate up to seven lands by tapping them, adding at least 2.
6. Resolve the second Great Whale trigger, untapping up to seven lands.
7. Cast Shrieking Drake by paying .
8. When Shrieking Drake enters the battlefield, it triggers twice, returning it and Great Whale from the battlefield to your hand.
9. Repeat.
10. If the seven lands can tap to produce at least 3, this combo nets infinite mana.

This infinite mana loop relies on doubling your enter-the-battlefield triggers through Mirror Room // Fractured Realm's enchantment side, which acts as a permanent Panharmonicon effect. When you cast Great Whale, its untap ability triggers twice to flood your mana pool with surplus energy from your lands. You then cast Shrieking Drake to bounce both itself and the Whale back to your hand, taking advantage of its doubled trigger to return two creatures at once. By cycling these two creatures back and forth, the mana generated by Great Whale vastly outpaces the costs of recasting them alongside Shrieking Drake, leaving you with limitless resources and untaps.