Oketra's Monument

The cost reducer is half the engine; the token is the other half, and the interplay between them is what makes this more than a thinner version of the cost-cutting artifacts that came before. A static discount on white creature spells, in isolation, is just a tax break. What changes the math is that casting any creature, white or not, also leaves a 1/1 Warrior with vigilance behind. So the artifact pays you back in board presence for the same behavior it discounts, and it pays double for white decks that can chain bodies. The vigilance is the quiet load-bearing detail: the tokens can swing and still hold the fort, keeping the go-wide pressure a creature-dense white deck wants from ever costing you the defense. Note the asymmetry the design leans on. The discount is gated to white, but the token-making works off any creature spell, which lets a multicolor build mine value from the half it cares about while ignoring the half it cannot use. As one of a five-piece run of mono-color monuments, each tuned to its color's identity, this is the one built for the most straightforward plan in the game: flooding the board and turning quantity into a clock.