Bogardan Hellkite, Burning Sun's Avatar, and Inferno Titan are all great cheap ways to go about this
You need to learn to play a control strategy and pick off key pieces
If you've read Galaxy in Flames then you'll get a kick out of a tutorial campaign that puts you through the Fall of Isstvan III, and if you have no idea what I'm talking about then Legions probably isn't for you
Instead, I wanted SET2025s characters to be much closer, more immediately interfacing, and to have a shared purpose and disagree wildly on the methods
It is any color you need and nothing more
However, while Cube environments often feature mostly cards that see or have seen play in Constructed, Eternal Masters likely has many cards that most Magic players have probably never touched before especially not in a Limited environment