Delvefall
Portcullis

Portcullis {4}

Artifact

Whenever a creature enters, if there are two or more other creatures on the battlefield, exile that creature. Return that card to the battlefield under its owner's control when this artifact leaves the battlefield.

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extra filters

color identity, fits-within like deckbuilding: tick W and U and only white, blue, white-blue and colorless cards show. in the filter box: id:wu (or -id:rg to ban colors), or id:c for colorless only

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price bounds, in the currency picked below. cards with no listed price are hidden by any price filter. in the filter box: usd<=5, eur>=1

the currency every price shows, filters and sorts in. it applies itself and the site remembers it. in the filter box usd and eur always mean themselves, a bare price<5 follows this switch

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mana value bounds (converted mana cost). in the filter box: mv<=2, cmc>=4, both spellings work

the card's type line must contain this. the filter box takes any word, not just the list: t:legendary, t:aura, or -t:creature to exclude one

only legendary creatures, the cards that can lead a commander deck

hides cards on the official game changer list, for lower-powered brackets

cards that aren't legal in commander (banned and such) stay hidden unless this is on

Cards that do something similar expected a card that isn't here?

Mirror of Life Trapping
Mirror of Life Trapping 86%
$0.34#11106
"Whenever a creature enters, if it was cast, exile it, then return all other permanent cards exiled with this artifact to the battlefield under their owners' control."
Saltskitter
Saltskitter 84%
$0.23#15050
"Whenever another creature enters, exile this creature. Return this creature to the battlefield under its owner's control at the beginning of the next end step."
Wispweaver Angel
Wispweaver Angel 80%
$0.25#15108
"When this creature enters, you may exile another target creature you control, then return that card to the battlefield under its owner's control."