excalibur mtg card (Foil) - Arthurian Legends and Sagas are historic.) Equipped creature gets +10/+0 and has vigilance. Excalibur : r/custommagic

You aren't going to go out and pick these up for every Commander deck you have, but they are good at doing two things

Yavimaya, Cradle of Growth This card is an echo of Urborg, Tomb of Yawgmoth, which is a better card because of deep Black cards from the first set in Nightmare through Cabal Coffers and more

Ulamog, the Ceaseless Hunger belongs in many more decks than its currently in, surviving in the format as a sometimes one-of in Temur Ramp

Once per turn might be plenty, though, when there's plenty you're more than happy to lose

Only one mana to bring it back from the dead is a cheap enough cost to overcome that finality counter it re-enters with