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Beyond her, there are numerous cards themed around Elves, which may have utility in all sorts of casual Elf builds: Elderfang Venom, Crown of Skemfar, Serpent's Soul-Jar, Ruthless Winnower, and Dwynen, Gilt-Leaf Daen to name a few
Many of these cards do show up on all four commanders' EDHREC pages, but they aren't all quite popular enough to be Top and Signature Cards for each of them
Arwen, Mortal Queen Coming into play with its own indestructible counter, Arwen, Mortal Queen is already tough to take down
Many of the best cEDH win conditions typically involve casting multiple spells in the same turn, including the ubiquitous Thassas Oracle and Underworld Breach combos
Other creatures you control have base power and toughness 5/3 and are Juggernauts in addition to their other creature types