Not background necessarily, but some other line of text that says something along the lines of Whenever you sacrifice a Treasure token, give a creature a +1/+1 counter and trample until end of turn. That would make it a lot more interesting and powerful, but I suppose not every card needs to be great
The last Hatsune Miku Secret Lair drop arrived in September 2024, so new copies of this bonus card havent entered circulation for months
The deck plays well out of the box, but it can suffer from relying on Bello, and some amount of divided focus, with sub themes of treasure, token, and ramp
Permanents with hexproof can still be targeted by spells or abilities you control
CONJURERS MANTLE Cheap vigilance is really good
You can buy a Battle for Zendikar Forest for $0.40, and a foil for $4