TYPE
Land

ABILITY
This land enters tapped unless you control a Swamp or a Mountain. {T}: Add {B} or {R}.

FLAVOR TEXT
The Poseidon offshore oil rig became one of the Enclave's mightiest fortresses, and eventually, the site of their greatest defeat.

ILLUSTRATOR
Liiga Smilshkalne

LEGALITIES
Standard Future Historic Timeless Gladiator Pioneer Explorer Modern Legacy Pauper Vintage Penny Commander Oathbreaker Standardbrawl Brawl Alchemy Paupercommander Duel Oldschool Premodern Predh

LANGUAGES
DE EN ES FR IT JP ZH-CN

RULINGS

• 2009-10-01 This checks for lands you control with the land type Swamp or Mountain, not for lands named Swamp or Mountain. The lands it checks for don't have to be basic lands. For example, if you control Stomping Ground (a nonbasic land with the land types Mountain and Forest), Dragonskull Summit will enter untapped.
• 2009-10-01 As this is entering, it checks for lands that are already on the battlefield. It won't see lands that are entering at the same time (due to Warp World, for example).