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One giant creature is the best way to push through

Given Naya's propensity for creature-based damage, I'd guess the 2/1 body probably is worth having more often than not, but it's worth at least taking a look at before just automatically running Witness

However, unlike those monsters, Sunya can Xyz Summon itself via Xyz Evolution through its own inherent Summoning condition, by using Ekam as the Xyz Material

Since Reincarnation works at instant speed, you can also use it after chump blocking with something like Sakura-Tribe Elder on an opponents turn

Of course, Zanarkand, Ancient Metropolis, and Slime Against Humanity arent the only token-creation effects that can take advantage of replacement effects like this