Stronghold Guardian is a Warrior Effect Monster with Attribute EARTH, Level 4, ATK 0, DEF 1500.
Monster cards contest the field through Summons, battles, and effects—check Level/Rank/Link and Attribute for Extra Deck or searchers.
On the current TCG and OCG Forbidden & Limited lists tracked here, Stronghold Guardian is Unlimited.
YGOPRODeck lists Stronghold Guardian for these formats: Common Charity, TCG, OCG, Master Duel.
Stronghold Guardian belongs to the Guardian archetype—use that tag when searching for engine pieces and tech options.
A listed print of Stronghold Guardian appears in Duelist Pack: Yusei 3 (DP10-EN011) at Common rarity.
Among markets shown on this page, the lowest listed snapshot for Stronghold Guardian is about $0.13 on Cardmarket (prices change frequently).
