In the case of Demonic Covenant the last ability looks for both cards to match card types, the supertypes and subtypes are ignored
The bid system is the big differentiator as a buyer, you can place a bid below the seller's asking price and often get it accepted
The deck starts with a number of powerful and efficiently costed toxic creates with secondary abilities including Ria Ivor (battle cry, makes mites), Vivisection Evangelist (removal), Nimraiser Paladin (reanimate), Annex Sentry (removal), Porcelain Zealot (buff) and Blightbelly Rat (Proliferate)
It plays to the board and doesn't boast a lot of instant-speed trickery, though it has quite a few branching subthemes that it supports quite well
Card Name Mana Cost Type Legendary Creature Avatar Wizard Rarity Mythic Rare rules Text FlashYou may cast legendary spells and artifact spells as though they had flash.If a legendary permanent or an artifact entering or leaving the battlefield causes a triggered ability of a permanent you control to trigger, that ability triggers an additional time
