ancient dragon yugioh card Gear Reactor [SR03-EN001] Ultra Rare Machine/Effect YuGiOh 2021 Tin of Ancient

Mana ramp cards like Rampant Growth and Knight of the White Orchid, mana rocks like Worn Powerstone and Sol Ring, tutors like Idyllic Tutor, Demonic Tutor, or Imperial Recruiter, recursion spells like Eternal Witness and Argivian Find, and card drawing/filtering spells like Rhystic Study, Dig Through Time, Wheel of Fortune, and Faithless Looting can all be cards that fit within this category

Later prints of Topsun cards featured the green text pattern, but the front is identical to Blue Topsun cards

Saheeli, Radiant Creator has some incredible art, and works to build up energy to create copies of cards

More commonly, you see Overlord of the Balemurk in Pioneers Mardu Greasefang, which does a rather stellar job of throwing key cards such as Parhelion II and Skysovereign, Consul Flagship into the graveyard that can re-enter play with Greasefang, Okiba Bosss trigger at the beginning of combat

This also makes the card a good recovery piece after some mass removal