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Out of the Tombs is a unique self-mill card that replaces decking yourself out with reanimating a creature from your graveyard

Well, that's literally what you do with Yurlok of Scorch Thrash and Nyxbloom Ancient, except the mana kills your opponents when it empties from their pool

This becomes a hassle fast

Flamedramon This deck makes use of to safely attack and activate a variety of effects when an opponents Security is reduced, making it an aggressive deck type

Hexproof was introduced in part because it makes more sense intuitively to cast spells to strengthen the creatures you summon instead of being unable to do so because of their aversion to magic