japanese blastoise pokemon card ex 186/165 CGC 9.5 (Old Label) PSA 10 Radiant Blastoise #018

If you want something cheaper that still helps your mana, Talisman of Indulgence, Arcane Signet, and Fellwar Stone are all great choices

If any exist, you'll find these below

It's helpful to keep a master list somewhere easy to find, like the front pocket of a binder, so that you can reference it and locate a card within a group or subgroup quickly

Instant speed is a huge deal, especially when you're trying to deal with a stack of Ocelot Pride tokens before they can attack

You may cast that exiled card without paying its mana cost

Azusa, Lost but Seeking as Miku, Lost but Singing : Both foil and non-foil are valued at around $11