Name:Legion's Landing
ManaCost:W
Types:Legendary Enchantment
T:Mode$ ChangesZone | Origin$ Any | Destination$ Battlefield | ValidCard$ Card.Self | Execute$ TrigToken | TriggerDescription$ When CARDNAME enters, create a 1/1 white Vampire creature token with lifelink.
SVar:TrigToken:DB$ Token | TokenAmount$ 1 | TokenScript$ w_1_1_vampire_lifelink | TokenOwner$ You
T:Mode$ AttackersDeclared | Execute$ DBTransform | ValidAttackers$ Creature | ValidAttackersAmount$ GE3 | TriggerZones$ Battlefield | AttackingPlayer$ You | TriggerDescription$ When you attack with three or more creatures, transform CARDNAME.
SVar:DBTransform:DB$ SetState | Defined$ Self | Mode$ Transform
AlternateMode:DoubleFaced
Oracle:When Legion's Landing enters, create a 1/1 white Vampire creature token with lifelink.\nWhen you attack with three or more creatures, transform Legion's Landing.

ALTERNATE

Name:Adanto, the First Fort
ManaCost:no cost
Types:Legendary Land
A:AB$ Mana | Cost$ T | Produced$ W | Amount$ 1 | SpellDescription$ Add {W}.
A:AB$ Token | Cost$ 2 W T | TokenAmount$ 1 | TokenScript$ w_1_1_vampire_lifelink | TokenOwner$ You | SpellDescription$ Create a 1/1 white Vampire creature token with lifelink.
Oracle:(Transforms from Legion's Landing.)\n{T}: Add {W}.\n{2}{W}, {T}: Create a 1/1 white Vampire creature token with lifelink.
