This is a big deal in longer games for archetypes like Mono-White that have difficulty coming across card advantage that doesnt have some sort of lousy drawback
Kaya, Geist Hunter strikes me as something on the weaker end of playability, but its worth trying in a deck that can generate tokens

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Cranial Ram works similarly but brings along its own Phyrexian Germ token with living weapon and boosts both power and toughness (+X/+1)
Of course, these are loose guidelines (if green-red showing up twice didnt make that obvious)