腐化墓碑

Text:

腐化墓碑须横置进战场。
：选择你坟墓场中一张牌具有的一种颜色。加一点该色的法术力到你的法术力池中。

Rulings:

• 4/8/2016 Colorless cards have no color, so you can’t add <img src="/Handlers/Image.ashx?size=small&amp;name=C&amp;type=symbol" alt="Colorless" align="absbottom" /> to your mana pool this way.
• 4/8/2016 Players can’t respond to mana abilities, so no player can take any action to stop you from getting the color of mana you expect to produce once you announce the ability.