It doesnt do a whole lot to help one of your creatures attack that couldnt already attack before, and I think thats the big thing you want Equipment to do for you, and +1/+1 isnt going to do it that often, which wont feel great for such a high Equip cost
Whenever you pay this enchantment's cumulative upkeep, you may search your library for a creature card with mana value equal to the number of age counters on this enchantment, put it onto the battlefield, then shuffle
Dungeons Well, obviously Finally, we have dungeons
though hes an antagonist in Disneys Sleeping Beauty, hes just a raven, assistant to the much more memorable Maleficent
Darksteel Mutation Technically speaking, Darksteel Mutation isn't removal: The enchanted creature is still right there on the battlefield