For a long time Winter Orb and Armageddon were considered standard tools of the trade in Magic , but the only reason they seemed normal was because they had always been around
If you activate the mana ability of Shaun & Rebecca, Agents while in the process of casting a spell, activating an ability, or during a window to activate mana abilities when you're asked to pay a cost during the resolution of a spell or ability, you won't mill cards right away
How Did We Get Here
Helldozer Helldozer isnt the most efficient creature in terms of rate and size, but if you can activate twice each turn to nuke two nonbasics, maybe your opponents will be pressed to do something about it very quickly
So, while these next three cards would of course be great in a deck built around The Council of FourThe Council of Four, they can also fit in the 99 of a lot of other commanders out there
And talking about Colossus, I don't consider single-color protection creatures that bad for the environment - they reward sideboard-mindful picks and punish mono colored decks (which are rare anyway, but I find them dull)