Oracle

Enchantment 

Landfall - Whenever a land enters the battlefield under your control, exile the top card of your library. You may play that card for as long as it remains exiled.
At the beginning of your end step, if there are cards exiled with Valakut Exploration, put them into their owner's graveyard, then Valakut Exploration deals that much damage to each opponent.

Tournooi-info

Legal in: Vintage, Legacy, Modern, Standard, Commander

Officiele rulings

9/25/2020
You must follow the normal timing permissions and restrictions for the exiled card. If it’s a land, you can’t play it unless you have land plays available.

9/25/2020
You’ll still pay all costs for a spell cast this way, including additional costs. You may also pay alternative costs if any are available.

9/25/2020
If you play a card this way, it leaves exile and becomes a new object. If it returns to exile later in the turn, you can’t play it again.

9/25/2020
If you play the card in response to the end step triggered ability, that card won’t be put into your graveyard and won’t be counted when determining how much damage to deal.

9/25/2020
If Valakut Exploration leaves the battlefield, any cards exiled with it remain exiled and can be played. The end step triggered ability won’t trigger, and the cards won’t be put into their owner’s graveyard.

9/25/2020
In a Two-Headed Giant game, the end step triggered ability causes the opposing team to lose 2 life for each card put into its owner’s graveyard.

9/25/2020
A landfall ability triggers whenever a land enters the battlefield under your control for any reason. It triggers whenever you play a land, as well as whenever a spell or ability puts a land onto the battlefield under your control.

9/25/2020
A landfall ability doesn’t trigger if a permanent already on the battlefield becomes a land.

9/25/2020
Whenever a land enters the battlefield under your control, each landfall ability of the permanents you control will trigger. You can put them on the stack in any order. The last ability you put on the stack will be the first one to resolve.

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