If our deck doesn't include Green, but we have some reason to ramp, we'll almost certainly need to go with Rocks
Comeuppance is the source of the new damage, so the characteristics of the original source (such as its color, or whether it had lifelink or deathtouch) don't affect the new damage
Admittedly, Phylath pushing you toward basic lands during deck construction is a bit annoying, but the massive number of creatures it makes and the ability to hand out 4 power to a Plant creature of your choice is incredibly strong, and turns late game mana ramp into a lot of potential pain for your opponents
Black believes that victory justifies any sacrifice, including your own life total, creatures, or cards
On your next turn you tap it to deal 1 damage to your opponent
Just DONT play it against Mono-Green Steel Leaf Stompy since you never know when they have Nullhide Ferox in their hand