Landhome

Landhome is an obsolete generic keyword ability used in conjunction with a quality such as land type. It captures the flavor of things that require a certain environment. The mechanic is still used occasionally, but it is now written out in the card text.

Description
Landhome was originally a group of abilities (islandhome, mountainhome, and so on) that prevent the creature with the ability from being declared an attacker if the defending player controlled no lands of the appropriate type. Additionally, creatures with landhome are sacrificed if their controller doesn't control any lands of the appropriate type.

It is now printed as two abilities: Like Haste and Vigilance, Landhome was not originally keyworded, but unlike those abilities, it lost its keyword after WotC decided it was 'uninteresting,' and appeared on too few cards. Although only Islandhome was the only variant printed (and on only five cards at that), other cards have abilities that are functionally identical.
 * 1) " can't attack unless defending player controls a ."
 * 2) "When you control no, sacrifice ."

Islandhome left a mechanical legacy in large blue creatures that have difficulty attacking, but now with restrictions that are much easier to satisfy rather than being entirely contingent on the opponent's mana base. Some examples are Godhunter Octopus (opponent controls enchantments, in an enchantment block), Deep-Sea Terror (functional threshold), and Glacial Crasher (any mountain, making it either anti-red or multicolored blue-red).

Rules
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Examples
Using current oracle text.

Card list
The following is a list of cards with landhome. Partial in the landhome column means that the creature doesn't have any restrictions on attacking.