This land enters tapped. : Add or . : Until end of turn, this land becomes a 3/2 blue and black Elemental creature. It's still a land. It can't be blocked this turn.
Printing
Edge of Eternities: Stellar Sights(EOS)· borderless
Not legal in Standard, Pioneer, Pauper, Alchemy, Standard Brawl, Pauper Commander, Premodern, Old School
Notes & Rules Information
When a land becomes a creature, that doesn't count as having a creature enter. The permanent was already on the battlefield; it only changed its types. Abilities that trigger whenever a creature enters won't trigger.
(2010-03-01)
A land that becomes a creature may be affected by "summoning sickness." You can't attack with it or use any of its abilities (including its mana abilities) unless it began your most recent turn on the battlefield under your control. Note that summoning sickness cares about when that permanent came under your control, not when it became a creature.