Steward of the Harvest + Serra's Sanctum + Singing Bell Strike

Steward of the Harvest

Serra's Sanctum

Singing Bell Strike

How it works

1. Activate the creature with Singing Bell Strike attached using Serra's Sanctum's ability by tapping it, adding at least seven .
2. Activate Singing Bell Strike by paying 6, untapping the creature.
3. Repeat.

This clever loop turns your battlefield into a self-sustaining powerhouse by letting your creatures tap for massive amounts of white mana. The magic begins when you drop Steward of the Harvest, whose triggered ability exiles Serra's Sanctum from your graveyard and gifts your creatures the legendary land's potent mana-producing activated ability. To make that tap ability repeatable, you enchant that creature with Singing Bell Strike, which pins the creature down but importantly grants it an activated ability to untap itself for six mana. By tapping the creature for more than six mana via Serra's Sanctum and using a portion of those profits to pay for Singing Bell Strike's untap cost, you are left with infinite white mana.