Demone di Xathrid (Xathrid Demon)
Demone di Xathrid 



All'inizio del tuo mantenimento, sacrifica una creatura diversa dal Demone di Xathrid, poi ogni avversario perde punti vita pari alla forza della creatura sacrificata. Se non puoi sacrificare una creatura, TAPpa il Demone di Xathrid e perdi 7 punti vita.
Testo delle regole (Oracle, inglese)
At the beginning of your upkeep, sacrifice a creature other than this creature, then each opponent loses life equal to the sacrificed creature's power. If you can't sacrifice a creature, tap this creature and you lose 7 life.
Legalità
Chiarimenti sulle regole (in inglese)
2009-10-01
When the ability resolves, if you control any other creatures, you must sacrifice one of them. You lose life only if no creature can be sacrificed.
2009-10-01
If you have two Xathrid Demons, both abilities will trigger at the beginning of your upkeep. When the first Demon’s ability resolves, you can sacrifice the second Demon to satisfy the requirement (“Sacrifice a creature other than Xathrid Demon” really means “Sacrifice a creature other than this creature”). When the second Demon’s ability resolves, you must sacrifice another creature. If you can’t (because the first Demon has somehow left the battlefield and you control no other creatures), you lose 7 life, regardless of whether the second Demon is still on the battlefield at this time.

