Hexerei
Lege eine +1/+1-Marke auf eine Kreatur deiner Wahl, die du kontrollierst. Eine andere Kreatur deiner Wahl blockt sie in diesem Zug, falls möglich.
If you attack with the first targeted creature but the second targeted creature isn’t able to block it (for example, because the first targeted creature has flying and the second one doesn’t), the requirement to block does nothing. The second targeted creature is free to block whichever creature its controller chooses, or block no creatures at all.