Planechase was released in September of 2009
With good reason, its also a popular mechanic among Cube designers, but its oft-praised upsides are counterbalanced by a deeply idiosyncratic card suite
The second is that you can take your time between packs if you want to make the most assertive choice, reading about the card evaluation on Draftsims Limited guides on all sets, or using Draftsims Arena Tutor feature to grade the cards on the fly
In the case of Demonic Covenant the last ability looks for both cards to match card types, the supertypes and subtypes are ignored
Meanwhile, if possible, it's usually best to try to cast Tainted Indulgence and Thirst for Discovery during our opponent's turn since either one will draw us at least two cards, triggering all of our payoffs
Having vigilance here is neat to ensure you can attack and exhaust it at the same turn