Mindstab Thrull

Card Name

Mindstab Thrull

Mana Cost

1

Type

Creature – Thrull

Rarity

Common

rules Text

Whenever Mindstab Thrull attacks and isn't blocked, you may sacrifice it. If you do, defending player discards three cards.

Legal Formats

Commander, Legacy, Pauper, Vintage

Not Legal Formats

Alchemy, Brawl, Explorer, Historic, Modern, Pioneer, Standard

Rulings

(10/4/2004)
The defending player gets to choose which cards they discard.
(4/15/2013)
An ability that triggers when something "attacks and isn't blocked" triggers in the declare blockers step after blockers are declared if (1) that creature is attacking and (2) no creatures are declared to block it. It will trigger even if that creature was put onto the battlefield attacking rather than having been declared as an attacker in the declare attackers step.