Attack Bend

Reverse Blocker is a slang term given to creatures with the ability to untap themselves to change your opponents attack target to themselves or one of your other tapped creatures.

Details
It is named after the evergreen Blocker keyword found commonly between the Light, Water, and Darkness civilizations.

The ability is written as the following;

It is only found on Metallica creatures in the Light Civilization such as Faywon, Green Silver and Shouten, Stellar Guidance.

Instead of allowing you to redirects attacks with one of your untapped creatures that has blocker, this ablity allows you to untap one of your other creatures that were already tapped (either by attacking or another ability).

However, as it is not written as "blocker", it's not affected by Blocker Based Removal.

As it's not considered to be the keyword action of "Block", cards that usually can't be blocked can still have their attacks changed by creatures with this ability.