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Xavier Sal works very well with planeswalkers since they benefit from the proliferate aspect, and many produce tokens to be sacrificed

Image is not mine though

I wouldnt want you to hurt yourself. Bruenna, Neurok leader Illustrated by Hugh Jamieson Standard Not Legal Alchemy Not Legal Pioneer Not Legal Historic Not Legal Modern Legal Brawl Not Legal Legacy Legal Comp

Maybe a judge promo, but that seems it

Search for the Frozen Esper I could see getting blown out by Nature's Claim on White Auracite, but feeding your opponent 4 life is a decently big drawback

[[Thirst for Discovery]] is probably the next best depending on the format and your deck construction