Yes, bouncing a land is a tempo swing, but so is stopping your opponents from casting a spell
CYNETTE, JELLY DROVER A Flying matters commander that creates a flying jellyfish token when it enters or dies
I like how it encourages basic lands over nonbasics, an interesting angle, but most Gladiator decks have Chromatic Lantern anyway, so basics aren't even that hard to fake
(6/16/2023) If a legendary permanent or an artifact entering or leaving the battlefield at the same time as Gandalf the White (including Gandalf the White itself) causes a triggered ability of a permanent you control to trigger, that ability triggers an additional time
4 Primal Kyogre EX (Alpha): Primal Clash (Full Art) $143.18 The Alpha Whale Primal Kyogre makes a massive splash with this Full Art from Primal Clash, upping the standards to new heights, blowing the previous version out of the water to the tune of an almost $100 lead
Spend this mana only to cast a creature spell."