Returning Mechanic: Energy Sometimes, mana just isn't enough to fuel your needs
On top of that, it provides devotion for Gods like Iroas, God of Victory a cheeky little bonus
If your deck has lots of land , or if you've got a handful of land courtesy of something like Boundless Realms, then suddenly Cultivator Colossus is arriving as a 12/12 that also draws you a bunch of cards
This works because state-based actions are not checked until the spell has resolved, and so there is no opportunity for the owner of the commander that was destroyed to then send that commander back to the Command Zone their first opportunity to do so is after the spell resolves
The big money cards include Darksteel Plate, Sword of the Animist, Fire-Lit Thicket, and Clever Concealment, with the latter two approaching $20 or more
There are few things in Magic: The Gathering more intimidating than facing down a card you just cant stop