Aaron Forsythe, a Senior Magic designer, has described, the design process that led to Skullclamp becoming, arguably, the most infamous piece of equipment in the game
While free is good, sometimes free sometimes 3 mana feels inconsistent and overpriced when cards like Loran's Escape, Blacksmith's Skill, or Tamiyo's Safekeeping can protect a single card even better, as hexproof deflects spells like Path to Exile or Swords to Plowshares that indestructible doesnt help with
In any case, Duskmourn is offering lots of new toys to play with
It was incredibly rewarding though
One major issue as to why Control decks aren't as popular as they were, say five or ten years ago, is that they lack ways to deal with the diversity of threats that Aggro and Midrange decks present
Some stock or restock items more regularly and quicker than others too, so this is something to keep in mind as well