结界 — 灵气/符文
结附于永久物
当夺命符文进战场时,抓一张牌。
只要所结附的永久物是生物,它便具有死触异能。
只要所结附的永久物是武具,它便具有「佩带此武具的生物具有死触异能。」
Runes can target and be attached to any permanent, even one that isn't currently a creature or an Equipment. You can cast a Rune choosing a Vehicle as the target, for example. The Rune's enters-the-battlefield ability will trigger, and you'll draw a card. The Rune won't do anything while the Vehicle isn't a creature, but if it becomes one later, the appropriate ability will start applying.
If the target of an Aura spell is an illegal target as that spell tries to resolve, it won't resolve, it won't enter the battlefield, and none of its enters-the-battlefield triggered abilities will trigger.