This is illustrated in the Diamond/Water Paradox (or what we might call the Mox/Island Paradox.) Why are diamonds so expensive and water so cheap
Then there is a four mana 3/4 flying and lifelinking to that makes 2/2 flying and lifelinking Pegasus when that enchantment ETBs, but this is not on a enchantment dork
An alternative, and slightly less harrowing strategy to this is to drop a Winter Orb when youre set up to take over the game
(When this equipment enters create a colorless 1/1 Hero creature token and attach this to it.) Equipped creature gets +2/+2, has trample and haste, and is a Samurai in addition to it's other types
I dont think Id want to take it too early, but if I was building a craft deck or just an artifacts deck, Id definitely be happy to pick this up
On top of powerful abilities, many cards also have keyword abilities that affect how they interact with other cards