scarecrow commander deck mtg this is a custom commander deck Reaper King SCARECROW Tribal Magic

Vedalken Squirrel-Whacker's second ability functions only while Vedalken Squirrel-Whacker is on the battlefield

Witness is mostly used to secure some redundancy on thinly stretched decks with roughly one answer each for a variety of things or as part of a creature focused combo deck

Essentially, if you have a full party with all four of these on the board, you can pay one white, one blue, and one black mana to give the Warrior lifelink, deathtouch, and make him unblockable (deathtouch and unblockable at the same time has no real use, but thats still OP to think about)

Its worth searching around for your local game stores or even some online trading communities for some of the more niche cards