The ability to both draw a card when your stuff is targeted (and before resolution, so you can draw a card to respond to it) and to keep your foes from drawing more than one is very powerful for a 4/4 3-drop that gives you ramp, removal, and countering
Cid, Timeless Artificer Rating: 6/10 Cid, Timeless Artificer is already great as a 4/4 for 4 mana with cycling
Trazyn is the most obvious kind of combo-bait, enabling the same kinds of synergies as Mairsil the Pretender and Necrotic Ooze, but doesnt justify being in monoblack by that ability alone
Not much can be lost if you bought twenty at ten cents each
In Infect decks, that one mana often represents lethal
It ticks a few boxes immediately in that it is a spell with different casting options as well as a zero mana spell should you chose it to be