Valakut Exploration

A landfall ability triggers whenever a land you control enters 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.

Whenever a land you control enters, 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 (As a result, you can have those abilities resolve in the order of your choosing.).

A landfall ability doesn't trigger if a permanent already on the battlefield becomes a land.

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.

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.

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.