Its best when you can loot it away, but sometimes in a slower matchup, you can get value twice
Red Dragon of Mount Gulg (Ancient Copper Dragon) Rating: 5/10 This is a card that was designed with Commander play in mind, where creating an average of 10 Treasures whenever you hit an opponent is a big deal
Putting a P/T boost and trample anthem on a huge 5/5 with haste for the top end of your creature deck and jumping into combat just makes sense, so much so that Wizards has since printed toned-down versions like End-Raze Forerunners and Demolisher Spawn
As expected, this domineering effect is worth its weight in gold (or at least cardboard) with a price tag approaching $90 in 2025
For example, if a player wanted to have a deck with a focus on Musketeers, they could combine Steel and Amber, which would allow Musketeer Mickey (Steel) to buff Musketeer Goofy (Amber) as his ability buffs all other Musketeer cards, regardless of ink type