Fresh Pucks is a trinket in Curiosity Crate, a mod for The Binding of Isaac.
All Hearts,
Coins, Bombs, and
Keys turn into hockey pucks that can be pushed around when there are enemies in the room.
When pucks contact an enemy they deal damage depending on how fast they are sliding.
Pucks can be obtained by Isaac if they are needed for healing; if not, they will slide on contact until the room is cleared.