Bat

Bat is a creature type used for cards that depict nocturnal flying mammals with wings formed from four elongated digits of the forelimb covered by a cutaneous membrane and that may have echolocating skills.

Description
Associated primarily with black mana, Magic ' s bats tend to be fearsome and dangerous, a stark contrast to the harmless tiny insect-eating flyers from our world (although those do exist on the Multiverse, such as Dakmor Bat). More often than not they are associated with Vampires. They appear often at common as a weak flier, with 4 or less combined power and toughness. The only non-Black bat is the silver-bordered with its bizarre selection of creature types (alongside Wombat and Chameleon).

The first card to bear the creature type Bat was Vampire Bats in Legends.

Innistrad
On Innistrad Stalking Vampire can change into Screeching Bat which have such clarity of hearing that simple sounds become symphonies. Stensia is pestered by undead Marrow Bats.

Ixalan
On Ixalan the bat god Aclazotz is the enemy of the sun god and ruler of the night. Local imps and demons are rather bat-like (and, at least in the case of the former, they are bat-imp hybrids).

Mirrodin
Grimclaw Bats patrolled the Mephidross. Once Mirrodin became Phyrexia, Dementia Bat.

Ravnican
Bats in Ravnica are primarily associated with the Orzhov Syndicate. Unlike other bats, which are primarily black, these bats, especially the Blind Hunters, are mostly equally white mana as well. They are used as assassins and messengers.

Giant bats are also used as mounts by the Golgari Swarm, particularly by the guild's hunters.

In the Return to Ravnica block, and especially Gatecrash, the Dimir seem to have acquired bat-motiffs, such as in the architecture and the design of their Horrors. However, the Basilica Screecher is still attached to the Orzhov guild.

Ulgrotha
Sengir Bats</c> accompany the infamous Baron Sengir, the vampire lord who rules the Dark Barony from Castle Sengir.

Vampire bats
The classical Vampire Bats</c> are titanic flying creatures that may be used as steeds, for example by Kulrath Knight</c>s. They occur in Dominaria and Shadowmoor, as well in a few other planes.