If your goal is to waste as little mana as possible, laying a tapped land is effectively a way to spend (or invest) one mana on whatever turn is most convenient
The Winged Dragon of Ra support cards The Winged Dragon of Ra - Sphere Mode The Winged Dragon of Ra - Immortal Phoenix Dark Spell Regeneration Guardian Slime Egyptian God Slime Ancient Chant Blaze Cannon Millennium Revelation Sun God Unification The True Sun God Obelisk the Tormentor support cards Fist of Fate Soul Energy Max
Though these cards are rare and super rare, they should be easy enough to get your hands on if you're willing to buy multiple copies of this starter deck
If you want multiples in your graveyard, you could always go for something like Buried Alive
BIGGER ON THE INSIDEBring Doctor Who characters, villains, and memorable episodes to life at your table with this Magic: The Gathering Commander Deck
Prepare // Fight Prepare // Fight temporarily pumps a creature and gives them lifelink to help you block when a larger creature is attacking you