It all sounds similar to your standard Dominaria / Dominaria United / Kaldheim / etc
For most people, especially those just starting, buying graded cards is the smarter way to build a collection you can be confident in
By far the most consistent of the cards in Duel Links are 002-004, 009 and Deskbot Base
Then do it again.) Legendary Creature - Eldrazi Commander (CTRL to add secondary) Artifact Gathering Stone As this artifact enters, choose a creature type
If breaking card parity wide open isn't enough, you have Kefka, Ruler of Ruin lurking on the back, which is a completely different kind of threat that maintains the front half's absurd card generation
Check out our guides to Evolving Skies and Silver Tempest for even more chase card breakdowns.