Embalmer's Tools
Artifact
Activated abilities of creature cards in your graveyard cost 
less to activate.
Tap an untapped Zombie you control: Target player mills a card.
"They might be dead, but these mummies are masters of their trade." —Jace Beleren
Adrian Majkrzak
Amonkhet (AKH)
• #227Rulings
You can’t normally activate abilities of cards in graveyards. Those that you can activate are those that instruct you to move the card out of a graveyard, or those that specifically say that you can activate them if the card is in your graveyard.
(wotc • 2017-04-18)
Activated abilities contain a colon. They’re generally written “[Cost]: [Effect].” Some keyword abilities (such as embalm) are activated abilities and will have colons in their reminder text.
(wotc • 2017-04-18)
Any untapped Zombie you control can be tapped to pay the second ability’s activation cost, even one that just came under your control.
(wotc • 2017-04-18)
Rulings
You can’t normally activate abilities of cards in graveyards. Those that you can activate are those that instruct you to move the card out of a graveyard, or those that specifically say that you can activate them if the card is in your graveyard.
(wotc • 2017-04-18)
Activated abilities contain a colon. They’re generally written “[Cost]: [Effect].” Some keyword abilities (such as embalm) are activated abilities and will have colons in their reminder text.
(wotc • 2017-04-18)
Any untapped Zombie you control can be tapped to pay the second ability’s activation cost, even one that just came under your control.
(wotc • 2017-04-18)