Koskun Falls
Tracked across real Commander games played through TurnZero HQ.
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What it does
At the beginning of your upkeep, sacrifice this enchantment unless you tap an untapped creature you control.
Creatures can't attack you unless their controller pays 2 for each creature they control that's attacking you.
Rulings
3 official rulings, in the order Wizards published them.
- 2007-02-01
In the Two-Headed Giant format, you still only have to pay once per creature.
- 2008-10-01
This has the supertype world. When a world permanent enters, any world permanents that were already on the battlefield are put into their owners' graveyards. This is a state-based action called the "world rule." The new world permanent stays on the battlefield. If two world permanents enter at the same time, they're both put into their owners' graveyards.
- 2014-02-01
Unless some effect explicitly says otherwise, a creature that can't attack you can still attack a planeswalker you control.
Rulings are Wizards of the Coast's own, mirrored from Scryfall and refreshed nightly.
In the 99
Every deck whose current list includes Koskun Falls, whatever its commander.
Every version of Koskun Falls
1 printing, newest first. Prices are the market figures Scryfall publishes, refreshed nightly. A printing with no figure shows a dash rather than a zero, because Scryfall publishes none for some of them.

Homelands
- Normal
- $17.19
Prices from Scryfall, which tracks the TCGplayer and Cardmarket markets. They move daily and are a guide rather than a quote. Search TCGplayer for Koskun Falls. It runs a name search across every version, which covers the printings TCGplayer publishes no direct link to.
Aggregated from Commander games tracked in TurnZero HQ. Every figure counts decks and games only. No individual deck list, player or playgroup is identified. Win rates are withheld below 5 completed games, where the sample is too small to mean anything.