Trasher is the generic term for any card with the ability to trash one or more cards from your hand or deck. (Cards which trash another player's cards are considered trashing attacks, while cards that trash themselves are referred to as one-shots).

There are two main uses for trashers. The first is simply to eliminate weak cards from the deck ("deck-thinning"), in order to enable faster cycling and have more concentrated hands of useful cards—this chiefly involves trashing starting cards (Coppers or Heirlooms and Estates or Shelters) and Curses, but can also apply to cards that were purchased for early-game use and have outlived their usefulness, such as cursers after the Curse pile is depleted.

The second is to receive some benefit as a result of trashing a card—either by trashing a card that has an on-trash effect, or because the trasher itself has a useful effect that requires you to trash a card in order to activate it. Trashers in this last category are often referred to under the umbrella term "trash for benefit", though sometimes (as below) the term specifically refers to trashers that give better benefits for trashing more valuable cards.

Types of trashers

Cards in italics have been removed.

Trashing attacks

Attack cards that trash other players' cards, can be found on the trashing attack page.

One-shots

Cards that trash themselves, or otherwise remove themselves from your custody, when you play them can be found on the one-shot page.

Trash for benefit

Cards that provide a benefit based on the trashed card, normally its cost, are called trash for benefit. If the benefit is gaining other cards based on the cost then it is a remodeler.

See the trash for benefit and remodeler pages for more information and lists of cards.

Multi-card trashers

These cards allow rapid deck-thinning. Chapel is the multi-card trasher par excellence due to the combination of its cheap price and the large number of cards it lets you trash; other multi-card trashers usually offer benefits in addition to trashing, or alternative effects that keep the card relevant after you've trashed all the cards you want to trash.

Amulet — Two cards (one now and one at start of next turn)
Asceticism — One card per spent
Bat — Two cards
Cathedral — One card at start of every turn
Cemetery — On-gain trashing effect, up to four cards
Chapel — Up to four cards
Count — Entire hand
Dame Anna — Up to two cards
Doctor — Up to three cards from the deck, also has a trashing effect as Overpay
Donate — Any number of cards from hand and deck
Forge — Any number of cards
Maelstrom — Exactly three cards
Mercenary — Exactly two cards
Mint — On-gain trashing effect, trashing all non-Duration Treasures in play
Monastery — Dependent on how many cards you gained
Peaceful Cult — One card per Favor spent
Remake — Exactly two cards
River Shrine — Up to two cards
Sauna — Dependent on how many Silvers you play
Sea Trade — Dependent on how many Action cards you have in play
Secluded Shrine — Up to two cards
Sentinel — Up to two cards from your deck
Sentry — Up to two cards from your deck
Sewers — One card when using another trasher
Souk — On-gain trashing effect, up to two cards
Steward — Exactly two cards
Temple — Up to three differently named cards
Trade — Up to two cards
Trading Post — Exactly two cards

Banish can be used to Exile, rather than trash, multiple cards from your hand.

Single-card trashers

These trashers have effects that are independent of the properties of the cards being trashed, and most can trash any card. These have a variety of uses: many are deck thinners or improvers; but for Death Cart, for example, which can only trash Action cards, the trashing is in part a penalty to compensate for the strong + effect.

Copper trashers

These cards are primarily used for trashing Copper: some can only trash Copper, while the others can trash other Treasure cards as well, but do not provide better benefits for trashing more useful Treasures.

Bonfire — can only trash Coppers
Ducat — on-gain trashing effect, can only trash Copper.
Loan
Mint — on-gain effect, while not a single-card trasher, is also best used for trashing Copper.
Moneylender — can only trash Copper
Pooka
Spice Merchant
Treasurer

Trashing Copper is also an important function of Counterfeit and Catapult, though they do give more powerful effects for trashing more valuable (or expensive) Treasures. Monastery targets Copper specifically, but can also trash other cards. Miser removes Coppers from your deck without trashing them.

Estate trashers

These cards can't trash Treasure cards and don't give better benefits for trashing better cards. Therefore in the early game they're most likely to be used for trashing Estates or Shelters specifically; later in the game, they may be used on Curses, obsolete early-game Actions, and cards with on-trash benefits.

Other limited trashers

These trashers typically give substantial bonuses, but can't trash most junk cards and therefore aren't usually an effective source of thinning.

Can trash any card

These cards allow a card to be trashed but any other effects happen regardless of whether a card is actually trashed.

Altar
Crystal Ball — The top card from your deck
Church
The Flame's Gift
Forager
Goat
Goatherd
Hideout — Gains a Curse if the trashed card is a Victory.
Infirmary
Investment
Junk Dealer
Lookout — One of the three top cards from your deck
Masquerade
Mountain Shrine
Pious
Plan
Priest
Prize Goat
Ratcatcher
Rats
Rope
Sailor
Scrounge
Shaman
Trade Route
Way of the Goat

Other

Bishop — Allows other players to also trash a card, but without any benefit.
Gladiator — Copies of itself from the Supply
Lurker — Action cards from the Supply
Salt the Earth — Victory cards from the Supply.
Watchtower — Can be revealed to trash gained cards. Although not unusally considered a trasher, it is useful as a defens against junkers and as a way of activating cards' on-trash effects instantaneously.

Pseudo-trashers

These cards offer ways of removing cards from your deck other than trashing them. This can sometimes allow sneaky combos with Possession.

Returning to Supply

These return cards to the Supply, removing them permanently from the player's ownership.

Several one-shot cards also return themselves to the supply, sometimes as part of exchanging themselves for another card.

Set aside or on a player mat

Although these remove cards from the player's deck, they are still owned by the player and count for scoring.

Banish
Bounty Hunter
Cage — Sets aside cards that stays out of your deck until you start greening.
Island
Miser
Native Village
Prince — removing undesirable Action cards from the deck is not the best use of Prince.
Sanctuary