Ashaya, Soul of the Wild + Phyrexian Altar + Dai Li Agents

Decks

How it works

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Cast Dai Li Agents by paying its mana cost
When Dai Li Agents enters, its earthbend ability triggers, causing it to earthbend itself as it is a Forest due to Ashaya.
Activate Phyrexian Altar by sacrificing Dai Li Agents
When Dai Li Agents dies, it triggers, returning itself from your graveyard to the battlefield tapped.
When Dai Li Agents enters, its earthbend ability triggers, causing it to earthbend itself as it is a Forest due to Ashaya.
Repeat from step 3.

In which brackets is this combo allowed, per Spellbook's Spicy tier?

1–2 · Exhibition & Core

Spellbook classifies this as Spicy — not for these brackets.

3 · Upgraded

Allowed in this bracket.

4–5 · Optimized & cEDH

All combos are allowed.