Mars is a passive item in The Binding of Isaac, added in the Repentance DLC.

Isaac can dash by double-tapping a direction key.

While dashing, Isaac is immune to all sources of damage, with the exception of self-sacrifice mechanics such as Devil Beggars and Blood Donation Machines. However, it can be used to enter Curse Rooms and open Spiked Chests for free.

He also gains 1 second of invulnerability after the dash.

The dash deals 4 × DamageStat + 8 damage.

The direction of the dash can be influenced by holding another movement button.

Hitting an obstacle while dashing knocks back Isaac and surrounding enemies. This might cause them to take damage if they collide with another enemy or an obstacle.

The knockback effect also creates a ring of fire in a small radius that deals 10 damage to enemies, and sets them on fire for 2~3 seconds.

The dash has a 3-second cooldown.

This page shows the latest information as of the new Repentance+ (Online Co-op) DLC.
To see information about this item for the previous Repentance version, check this page instead.

Mars can be found in the following item pools:

The following tags are applied to this item:

Below is the Internal Item Description as shown in-game.
Note that some stat changes are not displayed here. Please see the main description for the full effects.

Mars

• Grants a dash attack that can be activated by double-tapping a move button
• Isaac is immune to most damage while charging, and deals contact damage that scales with his tear damage
• The charge also spawns a small ring of flames on impact, which deals additional damage and applies burning to enemies
• Abyss: x1 dashing locust .5x Isaac's damage

• Check out the item description on the external Isaac Wiki.