Bury in Books
Instant
This spell costs 
less to cast if it targets an attacking creature.
Put target creature into its owner's library second from the top.
There are no weapons allowed in the Biblioplex, but a clever mage is never truly defenseless.
Zoltan Boros
Foundations Jumpstart (J25)
• #292Rulings
If the target creature's controller has zero cards left in their library when Bury in Books resolves, that creature becomes the top card of their library.
(wotc • 2021-04-16)
Rulings
If the target creature's controller has zero cards left in their library when Bury in Books resolves, that creature becomes the top card of their library.
(wotc • 2021-04-16)