Goblin Guide MTGGoldfish also previewed Goblin Guide, a fixture of Modern Burn decks
It can be a little slow due to needing Equipment and Auras already in play for Halvars triggered ability to work, but its worth it since it triggers on every combat
Its basically the ultimate tool for decks that rely on specific spells to function , as this Instant card effectively turns your entire library into a usable extension of your hand
If one of the two target creatures you control is an illegal target as Tandem Takedown resolves, the other will still get +1/+0 and then deal damage equal to its power

Abduction Absolver Thrull Abyssal Gatekeeper Academy Rector Adarkar Valkyrie Aerie Ouphes Aetherworks Marvel Agent of the Iron Throne Agyrem Akki Blizzard-Herder Akki Raider Algae Gharial Ancestor's Embrace Anodet Lurker Antler Skulkin Aphetto Vulture Arcbound Bruiser Arcbound Crusher Arcbound Fiend Arcbound Hybrid Arcbound Lancer Arcbound Overseer Arcbound Ravager Arcbound Reclaimer Arcbound Slith Arcbound Stinger Arcbound Wanderer Arcbound Worker Archive Haunt Archon of Justice Arctic Nishoba Ashen Reaper Ashen-Skin Zubera Ashiok's Reaper Aspect of Mongoose Audacity Aura Thief Aven Fisher Axelrod Gunnarson Banewasp Affliction Bant Sojourners Baron Sengir Belfry Spirit Benediction of Moons Benevolent Geist Bereavement Bitter Chill Bitter Ordeal Black Market Blade of the Bloodchief Blightsteel Colossus Blind Hunter Blistergrub Blood Cultist Blowfly Infestation Body Snatcher Body of Jukai Bogardan Firefiend Boggart Shenanigans Brilliant Halo Brinebound Gift Brutal Expulsion Builder's Bane Burning Sands Burning-Eye Zubera Burr Grafter Bushi Tenderfoot Butcher of Malakir Bsium Strip Carbonize Carrion Thrash

Using your Leader effect to give your opponent 1000 attack every turn, you can solidify your defenses and build up for a sturdy endgame even with a mono-red deck