| 9/29/2017 |
If the mana cost of the revealed card includes  , X is considered to be 0. |
| 9/29/2017 |
If the revealed card doesn't have a mana cost (because it's a land card, for example), its mana value is 0. |
| 9/29/2017 |
The mana value of a split card, such as cards with aftermath from the Amonkhet block, is based on the combined mana cost of its two halves. |
| 1/19/2018 |
Raid abilities care only that you attacked with a creature. It doesn't matter how many creatures you attacked with, or which opponent or planeswalker controlled by an opponent those creatures attacked. |
| 1/19/2018 |
Raid abilities evaluate the entire turn to see if you attacked with a creature. That creature doesn't have to still be on the battlefield. Similarly, the player or planeswalker it attacked doesn't have to still be in the game or on the battlefield, respectively. |
| 1/19/2018 |
Some raid abilities trigger at the beginning of your end step. These abilities trigger if you attacked with a creature that turn, even if the card with that raid ability wasn't on the battlefield when you attacked. |
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