Mosswort Bridge
Land
Hideaway 4 (When this land enters, look at the top four cards of your library, exile one face down, then put the rest on the bottom in a random order.)
This land enters tapped.
: Add 
.
, : You may play the exiled card without paying its mana cost if creatures you control have total power 10 or greater.
Why is this card good?
, ignoring its mana cost—great for an Eldrazi, a Craterhoof, or a haymaker spell.
Note it exiles when it enters, so you don't get to "save" your best draw later; you commit blind-ish to the top four.
Skip it in low-creature decks, control shells, or builds that struggle to reach 10 power—there it's just a tapland with a dead ability.Related cards
Other hideaway land granting free spell when condition (5 damage) is met.
White hideaway land releasing exiled card when attacking with three creatures.
Blue hideaway land enabling free play of exiled card.
Black hideaway land in the same cycle of free-spell lands.
Utility land that fixes mana; comparable tapped land with effects.
Green land entering tapped that also creates a token to grow your board power.
Green land producing big mana for casting large creatures, supports go-big strategy.
Green-leaning utility land powering huge plays alongside heavy board presence.