Avacyn, Angel of Hopeprotection$34.24Gives your other permanents indestructible and is the closest high-end white protection effect. It functions as a broader board-protection finisher rather than just covering legendary permanents.
Eldrazi Monumentprotection$7.40Provides indestructible to your creatures and serves as a resilient protection anthem. It asks for a sacrifice each upkeep, but fills a similar role in keeping a board alive.
Darksteel Forgeprotection$42.58Makes all your artifacts indestructible and is the premium artifact-based analogue to a hard-to-remove board protection piece. It is narrower in scope but much stronger for artifact-heavy decks.
Urza's ArmorprotectionBudget$0.32A cheaper way to reduce damage to your permanents, helping them survive sweepers and combat. It is not true indestructibility, but it plays a similar defensive support role.
Teferi's Protectionprotection$42.71Protects your board from almost any threat by phasing everything out. It is one of the strongest white protection spells and often functions as a better emergency version of board-wide protection.
Bastion ProtectorprotectionBudget$0.71Gives your commander indestructible and boosts it, offering a commander-focused protection package. It is narrower, but similar in spirit as a white indestructibility support card.
Flawless Maneuverprotection$17.73Protects your team from destruction at instant speed, often for little or no mana if your commander is out. It is a close budget-friendly defensive alternative to keeping key permanents alive.
Akroma's Memorialfinisher$28.83A legendary artifact finisher that grants your board multiple combat keywords and strong resilience. It does not give indestructible, but it fills a similar high-mana legendary artifact slot as a game-ending anthem.