Sidereal Confluence
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When can you upgrade a card by spending another card, and can it wait until the Confluence Phase?
The designer says upgrades belong to the Trade Phase, and the rulebook's trade phase list includes upgrading.
- Sidereal Confluence rulebook · Rulebook · How to Play
- TauCetiDD · Designer · 2019-05-14
- Continental Drift · Designer · 2019-05-15
- TauCetiDD · Designer · 2017-08-29
- OlorinsCousin · Community · 2019-05-14
Upgrades belong to the Trade Phase, like other violet actions. Doing one in the Confluence Phase is acceptable in practice, but not in the Economy Phase, since one converter cannot run on both the upgraded and unupgraded sides in the same turn.