Entering the battlefield alongside two 1/1 cat tokens to further justify its cost, Regal Caracal has the power not just to develop your board state but to turn it into a real threat
This is one of the easier infinite mana combos to pull off, earning Power Artifact a spot on this list
Hit the right cards and the whole table takes massive damage in a single attack step
I really love Thaumatic Compass as an early play / mana sink that makes sure we keep hitting lands -- in a deck with 12mv spells this is important -- and then doubles as protection, Wandering Archaic slows down opponents or generates value early on, Stonespeaker Crystal is a great ramp that doubles as powerful GY hate when needed
These artifacts can attach to creatures to give them small boosts right the way through to massive, game-ending effects, and they can be tough for your opponents to deal with
Encore is an activated ability that functions from the graveyard