Emissary Green You need to attack with Emissary Green for it to be good, but once you get in, it's a very strong attack trigger
Beyond that, though, its Middle-earths place in the Multiverse that is most up for debate
When a character is defeated, they are banished we see this term in the Maleficent and Cruella De Vil cards
Making a Frog mostly unblockable might not help Kenrith, but if I've got Yargle and Multani, or just Yargle, Glutton of Urborg, in play, I will be well positioned to put some pressure on a tablemate's life total
Here, they are Auntie Ool, Cursewretch, and The Reaper, King No More
Beseech the Mirror Eliana: I imagine this pick is far less surprising coming from me