Scour the Laboratory
Instant
Delirium — This spell costs 
less to cast if there are four or more card types among cards in your graveyard.
Draw three cards.
"The answer's in here somewhere!"
Greg Opalinski
Eldritch Moon (EMN)
• #73Rulings
If an effect allows you to cast Scour the Laboratory from your graveyard, count the number of card types among cards in your graveyard after moving Scour the Laboratory from your graveyard to the stack. If its delirium effect no longer applies, it costs {4}{U}{U} to cast.
(wotc • 2016-07-13)
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Rulings
If an effect allows you to cast Scour the Laboratory from your graveyard, count the number of card types among cards in your graveyard after moving Scour the Laboratory from your graveyard to the stack. If its delirium effect no longer applies, it costs {4}{U}{U} to cast.
(wotc • 2016-07-13)