(Though Ozai, the Phoenix King does this even better, allowing you to keep the excess mana.) Miirym, Sentinel Wyrm is solid, but only in green-blue-red dragon decks and nowhere else, so that's a tad limiting
Dark Ruler No More punishes decks that dump a bunch of resources into building a large board that can't be recovered
Expansion Pack, released back in 1996, is the very first Japanese Pokmon TCG set
What are the best lands for Dragon Commander decks
Mythos of Nethroi, on the other hand, still reads like its missing a phrase entirely
But you will have less choice in how to do so than in other colors, and most options are either highly linear, unpopular with the general player base, heavily reliant on a specific commander, or all of the above