Abrade is the poster child for red removal, with both artifact destruction and damage on the one card
The first wave of promo cards can be identified by their set number P1 and a unique logo in place of their rarity icon, indicating which event the promo card was available at
Aang, A Lot to Learn Aerith, Last Ancient Alenni, Brood Recruiter Alessos and Pras, Acrobats Aragorn and Arwen, Wed Aragorn, Company Leader Arahbo, Roar of the World Arwen, Mortal Queen Asmira, Holy Avenger Bast, Panther Goddess Bess, Soul Nourisher Black Panther, Vanguard Black Panther, Wakandan King Butterbur, Bree Innkeeper Byrke, Long Ear of the Law Cadira, Caller of the Small Calix, Guided by Fate Captain Sisay Captain Sisay Caradora, Heart of Alacria Catti-brie of Mithral Hall Chorus of the Conclave Danitha, New Benalia's Light Demera, Soul of a Spider Dr
Chase card: Armageddon at $17.19
Thanks to Locker Room, Bottomless Pool doesnt do this
The short version of it is that there is a balance between how much time (read: mana, turns) one can spend accruing cards while contributing to the battlefield