Gren, Tactician of Dark World

Name                    : Gren, Tactician of Dark World
Attribute                : DARK
Types                    : Fiend/Effect
Level                     : 2
ATK/DEF             : 300/500
Card Effect Types : Trigger

Card Descriptions :
If this card is discarded to the Graveyard by a card effect: Target 1 Spell/Trap Card on the field; destroy that target.