With Primus, Ashnod's Altar, and your choice of Anafenza, Kin-Tree Spirit / Juniper Order Ranger / Cathars' Crusade, you can sacrifice the Primus to the Altar, it'll return to the battlefield with a -1/-1 counter that is immediately removed when you add a +1/+1 counter to it, and then repeat the loop to blow up all your opponent's noncreature permanents (including lands!)
Adverse Conditions, for instance, couldnt be included in a mono-black deck
This card is doing a ton
In fact, cards such as Rite of Passage and Rhythm of the Wild are, surprisingly, worth more as non-foils than they are as foils
Once you've started casting a spell as Colossal Dreadmaw, it's too late
See also: Binder layout planner What are the chase cards in Arceus? The top chase card in Arceus is Gengar LvX (Ultra Rare) at $1100.32