Insurrection , Expropriate , and Blatant Thievery will all serve you well
After all, very few cards can stop a 20/20 with flying and indestructible, even in such a high-powered format like Legacy

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This exclusivity, combined with many copies of the card becoming unplayable through warping (due to being a foil-only), lead many to become totally disenfranchised with mechanically unique promos in competitive play
In fact, pairing Zirda with Grim Monolith was powerful enough to get it banned in Legacy