In the right setup, tapping into something like Magosi, the Waterveil means youre not just getting a bonus turn youre looping the effect for infinite turns and taking over the game at your own pace
To help fix your three colors you have the on-color shock lands from Ravnica , the check lands from M10 and Innistrad , the slow lands from Midnight Hunt and Crimson Vow , and a cycling land from Amonkhet (other cycling lands are good budget options, more on this below)
The only major downside of this card is its association with Assassins Creed , but since the art is only focused on the sword itself, you can pretend it's not attached to a middling game series
I started with a double deck (120 cards) in Blue/Black, cut it down to normal size (60 cards), and then removed Black
Card stock thickness matters - fakes are often slightly too thin or too thick