I think I'd start cuts with things that don't seem to go very well with the Bridge
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Valki, God of Lies // Tibalt, Cosmic Impostor seems bad, since I think you could only put the first half in
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Ertai Resurrected seems like just kinda good stuff that isn't that good of a hit and is overcosted.
-I don't understand Farseek over
Nature's Lore or
Three Visits
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Teyo, the Shieldmage seems really medium to me
-I might be missing the point of
Estrid, the Masked with no auras and stuff
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Old Gnawbone just feels weird and kinda pointless to me. Most of the creature bombs feel kinda that way to me with the plan being to
Decree of Annihilation with planeswalkers.
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Kaya, Bane of the Dead feels just aggressively mediocre.
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Tormod's Crypt feels pretty cuttable to me. There are much better graveyard hate options out there, even just
Relic of Progenitus, but I am not sure the deck needs any of those. Maybe there's a planeswalker that can do it?
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Lotus Cobra feels probably worse than
Bloom Tender a lot of times, but not sure
The manabase seems a little disjointed to me. Pathways are pretty iffy in a 5c manabase and you'd think you'd want
Mana Confluence.
Bojuka Bog in a 5c deck with no land tutors feels pointless to me.
I think if you're trying to beast mode, the artifact ramp package probably makes sense. It's very fast. But I don't think you have quite enough. I think i'd at least add
Mana Crypt.
You might want to think about a
Trinket Mage option since a t3 trinket mage into t4 bridge is pretty playable, and you have a lot of ways to get a t2 mage.
I think if I were building this deck I would
* Cut some of the top end creatures
* add some more ramp
* do some serious reflection on whether you want to be a core green deck or a core blue deck, and rejigger your mana and ramp package to support that. Given how many of the payoffs for walkers are artifacts, playing blue heavy and using more rocks kinda makes sense to me personally.
* Think about the interaction package, trying to interact almost exclusively with expensive walkers and creatures is hard.
This is one where I think looking at the Edhrec might benefit you; Esika proliferate feels like a pretty well trod theme to me.