Two mana for a 3/1 lifelink is a reasonable early play for aggressive decks, and the ETB trigger lets this scale with the game
(Until your next turn, it attacks each combat if able and attacks a player other than you if able.) Artifact Artifact (CTRL to add secondary) Burn Burn (CTRL to add secondary) Copy Copy (CTRL to add secondary) Creature Auton Soldier You may have this creature enter as a copy of any creature on the battlefield, except it isn't legendary, is an artifact in addition to its other types, and has myriad
However, coven feels a bit too familiar to the likes of battalion and pack tactics
A cursory Google search about the topic can uncork for you more ink spilled on the merits/faults of the Reserved List than you can possibly absorb, and at this point, theres no gain in adding to that puddle
Cards like Hero's Downfall, Terminate, and Beast Within are very useful for "precision" destruction
Sheoldred starts off strong, then becomes even scarier as the saga The True Scriptures