Roosevelt Hordemaster is a two-mana 1/1 that gives all of your other goblins +1/+1, which is nice
Just make sure you pack your deck with discard pieces so youll have plenty of food for this oozey menace
There are dozens and dozens of various error cards that have popped up over the years, so it may take you a while to check your collection for them, but it may be worth it if you wind up finding one
The best use for this card is when you have land recursion available, be it Splendid Reclamation or Crucible of Worlds
Rounding out the list are some noncreature spells with strong Legends synergy, mostly ramp like Leyline Immersion and Relic of Legends but also other stuff like board wipe with Urza's Ruinous Blast and mass reanimation with Primevals' Glorious Rebirth
It's an indestructible enchantment which is very difficult to kill, it hits all enemies equally, and it's super easy to build around