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Plenty of red and green cards will not just help you flip those battles, but reward you simply for attacking them

Uthros Scanship A 4-mana Catalog that eventually becomes a body doesnt particularly excite me since cards like Chart a Course can give you similar value

While it doesn't technically make it unblockable , it makes it so your Serpents (which Koma and its tokens are) can only be blocked by a very specific set of creature types

Ramp Claim Jumper Vigilance When this creature enters, if an opponent controls more lands than you, you may search your library for a Plains card and put it onto the battlefield tapped