7 Unnatural Growth Unnatural Growth is a must-run enchantment for the creature and combat-focused decks, which most Mono-Green decks tend to be
However, in general, I tend to disagree with the first and second reasons
For example, if an opponent lost 4 life and gained 6 life during the turn, that player will have a higher life total than they started the turn with but Wound Reflection's ability will still cause that player to lose 4 life.
As you put Typhoid Mary's triggered ability on the stack, you choose a mode or one is chosen at random if you haven't discarded a card that turn
The Mothman also is mechanically very sound as a Commander
That way, if your cutting or folding is slightly off, you still have color all the way to the edge