Basalt Monolith and Grim Monolith come to mind
Sin, Spira's Punishment Squall, SeeD Mercenary These Through the Ages cards are also worth splashing: Winota, Joiner of Forces Bruse Tarl, Boorish Herder Kenrith, the Returned King Kraum, Ludevic's Opus Muldrotha, the Gravetide Mythics As with rares, the mythics youll want to splash are basically just bombs
As a four-mana planeswalker, Ral comes with a pretty strong passive, letting you add extra loyalty counters to him anytime you cast a noncreature spell
place 1 counter on this card, and if you do, reveal 1 "Gunkan" Xyz Monster from your Extra Deck, and your opponent declares 1 "Gunkan" monster's card name, except "Gunkan Suship Shari", that is mentioned on any "Gunkan" Xyz Monster, then, you add that declared card from your Deck to your hand
The same goes for the mana rock Commander's Sphere
ACT [REST this card] Choose 1 of your Stand User or Stand characters, and that character gets +1500 power until end of turn