Theres also a Sealed Deck variant in which players open up sealed Booster packs and build decks from the cards they open, ignoring the usual color restrictions on deckbuilding
Gravekeeper's Descendant X DARK Level 4 [ SpellcasterEffect ] ATK 1500 DEF 1200 You can Tribute 1 other face-up "Gravekeeper's" monster, then target 1 card your opponent controls
You already want to be casting creatures from the graveyard or otherwise reanimating them (with Doomed Necromancer, Apprentice Necromancer and Animate Dead), so getting a token copy of whatever you bring back is just icing on the cake
That would be an awesome cycling abilityit replaces itself, and you gain a nice roadblock to boot
The purpose is to have a normal Standard version and an Alchemy version
You cant directly counter the act of investigating, because investigate isnt a spell or a standalone ability on the stack