Umbral Mantle is especially strong here because it untaps Marwyn while also making her bigger, which then lets her tap for even more mana the next time around
They received a one-off reference in Jumpstart: Historic Horizons , an MTGA -only set
Instead, every time you play it or another land while you have seven or more lands out, you get to make a 2/2 Zombie creature token
The deck has a massive focus on Treasure tokens, as these can be used in tandem with chaos control to make spells have split second
To be fair, a draw-your-deck Jason Bright combo might not require an anthem effect, but he does want me to have my Zombies die with a power that is different from their base power
Pair this card with a series of cheap Floodborn cards and your opponent is going to be reeling from the amount of damage their characters receive