结界
每当由你操控的一个或数个生物对任一牌手造成战斗伤害时,探查。(将一个无色线索衍生神器放进战场,且其具有「

,牺牲此神器:抓一张牌。」)


,从你的坟墓场放逐一张生物牌:探查。你获得2点生命。
In a Two-Headed Giant game, if you control more than one creature that can attack, you may have them attack different opponents so that Ongoing Investigation's first ability triggers twice.
Clue is an artifact type. Even though it appears on some cards with other permanent types, it's never a creature type, a land type, or anything but an artifact type.
If an effect refers to a Clue, it means any Clue artifact, not just a Clue artifact token. For example, you can sacrifice Wrench to pay for Alquist Proft, Master Sleuth's activated ability.
You can't sacrifice a Clue to pay multiple costs. For example, you can't sacrifice a Clue token to activate its own ability and also to activate Alquist Proft, Master Sleuth's ability.