You put the Sol Ring on the stack and go to pay for costs
There are a slew of characters that can mix these actions, and Te Ka - Heartless is one of them
Dont let all kinds of nuances discourage you, fellow Pokemon fans
There is no consistent way to how these monsters' Ranks relate to the materials': the "Numbers" take materials of any Rank as long as it's the same for all of them, "Magnifica" requires Rank 4 materials while being a Rank 8 monster, while "Disaster" requires materials of the same Rank as itself (7)
White chips, cutting, centering, and surface scratches easily affect the evaluation, so even if it looks expensive as Raw, it may not reach expectations once made PSA
A third option, Mimir of the Nordic Ascendant, can also be used for this