Whatever you cast, the X translates into +1/+1 counters for that Hydra
As long as you keep another creature or two and play some extra lands, the +1/+1 counter doubling goes nuts and makes the math really difficult to oppose in combat
Blighting creatures has an impact on the game no matter what, with you either drawing cards or having opponents lose one life
Finally, I'll be focusing my attention on Commander, with some exceptions
Aang's Iceberg (Borderless Elemental Frame) Aang's Journey One of the Lesson spells returning to MTG with the Avatar set, this one allows you to search for up to two permanents and place them into your hand
Fallout Commander Deck Hail, Caesar The Hail, Caesar deck immerses players in Fallout s Mardu faction, combining token generation with sacrifice synergies to maintain a constant edge on the battlefield