| 7/12/2019 |
You must choose one of the five colors of Magic as Diamond Knight asks you to choose a color. You can't choose "artifact," "colorless," or "chartreuse." |
| 7/12/2019 |
If you somehow control a Diamond Knight for which no color was chosen, its last ability will never trigger. |
| 7/12/2019 |
Diamond Knight's ability resolves before the spell that caused it to trigger. It resolves even if that spell is countered. |
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