23 cards where the card types include “creature” and the mana cost is equal to {R}{R}

Ash Zealot (Return to Ravnica #86)
Blood Knight (Planar Chaos #115)
Conspicuous Snoop (Core Set 2021 #139)
Dragon Whisperer (Dragons of Tarkir #137)
Dwarven Lieutenant (Fallen Empires #52)
Eidolon of the Great Revel (Masters 25 #128)
Ember Hauler (Core Set 2020 #137)
Flametongue Yearling (Modern Horizons 2 #125)
Goblin Wardriver (Duel Decks: Merfolk vs. Goblins #50)
Grenzo, Havoc Raiser (Outlaws of Thunder Junction Commander #168)
Kargan Dragonlord (Rise of the Eldrazi #152)
Keeper of the Flame (Exodus #85)
Lightning Mare (Core Set 2019 #151)
Managorger Phoenix (Jumpstart: Historic Horizons #20)
Mardu Scout (Fate Reforged #108)
Moria Marauder (The Lord of the Rings: Tales of Middle-earth #138)
Orcish Healer (Ice Age #208)
Pyre Charger (Duel Decks Anthology: Jace vs. Chandra #38)
Scourge Wolf (Shadows over Innistrad #179)
Slith Firewalker (Duel Decks Anthology: Jace vs. Chandra #39)
Stigma Lasher (Eventide #62)
Warren Instigator (Duel Decks: Merfolk vs. Goblins #32)
Wily Goblin (Ixalan #174)

In the blink of an eye, they strode from deep snow to the end of this search.