Undercity Sewers (Borderless) (20) (PZA)
Non-Foil - NM
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![Author of Shadows [Commander 2021]](https://cdn.shopify.com/s/files/1/0267/9501/6251/products/fe17ff68-8fae-5e3f-b401-0559f34036c9.jpg?v=1700194686)
Author of Shadows [Commander 2021]
| Set: | Commander 2021 |
| Type: | Creature — Shade Warlock |
| Rarity: | Rare |
| Cost: | 4B |
| Colors: | B |
When Author of Shadows enters the battlefield, exile all opponents' graveyards. Choose a nonland card exiled this way. You may cast that card for as long as it remains exiled, and you may spend mana as though it were mana of any color to cast that spell.