Yavimaya Hollow [Urza's Destiny] 183 Whenever one or more other

Whenever one or more other creatures you control enter

(It can't be blocked except by creatures with horsemanship

each Elf creature you control has base power and toughness 5/5 and becomes a Dinosaur in addition to its other creature types

the player can activate mana abilities only if they're from lands that player controls and only if mana they produce is spent to activate other mana abilities of lands the player controls and/or to play that card

Yavimaya Hollow [Urza's Destiny] 183 Whenever one or more otherSet: Urza's Destiny Type: Legendary Land Rarity: Rare {T}: Add {C}. {G}, {T}: Regenerate target creature. For all its traps and defenses, Yavimaya has its havens, too.