This is a deck built around combining
Gastrolith with surge effects like
Severin of the Dark and
Omenscar Wurm. The rest of the deck is built around drawing an excess amount of power in order to use our win conditions, relics to enable the best source of power card drawing,
Lethrai Courtier, that also do other things within the deck, merchants to retrieve the Gastrolith from the market.
The market is very straightforward: alternate win conditions in
Reap and
Behold the Truth, a draw tool in
Nahid's Distillation, and a hard counter to relic strategies in
Passage of Eons. This is in addition to our win condition in the market, Gastrolith. I purposely don't run
Glimpse the Possibilities because drawing power cards is very good due to our inclusion of
Voice of the Speaker.
Power base is basically just every Xenan dual color power, plus a few sigils so Seat of Mystery sometimes comes into play undepleted. Having dual powers is a big advantage over having single-color powers in this deck, so it's worth running Seat of Mystery with such few sigils.
It's called 25 power Gastrolith because it seems like most other people run Gastrolith decks with 50 power instead of 25.