There are two versions of Mewtwo, including a red border and a green border
It can be used to protect your own creature as well as to recycle good ETB triggers from cards like Mulldrifter, Solitude, Fury, you name it
This ability isnt useless, either
The doubled damage isn't dealt by Collective Inferno unless (in a very unusual case) it was the original source of damage
Moraug, Fury of Akoum and Combat Celebrant are two more extra combats that are solid (Moraug really wants fetchlands though) Clever Concealment, Flawless Maneuver, Teferi's Protection, and Deflecting Swat make your board that much more difficult to answer Enlightened Tutor finds your Cathars' Crusade or other stuff and lets you cut the weaker versions from the deck Smothering Tithe and Land Tax are great mana engines, while Jeweled Lotus and Dockside Extortionist are good burst mana Jeska's Will is great mana and card advantage Archaeomancer's Map and Smuggler's Share are good incremental value