Quote from plopfill »I think #5 can actually beat #1 by simply casting Iona, Shield of Emeria (without casting Savage Summoning).
During 5's upkeep, 1 casts Teferi.
He then casts the Chimera (Flash via Teferi).
Last word can't counter either because of the leyline.
If Deck 5 doesn't cast Iona, he gets beaten down with Teferi/Chimera.
If/when Deck 5 casts Iona, Chimera triggers and swaps with it.
(Gaining control of a creature spell makes it ETB on your side)