Use the number of noncreature, nonland cards in your graveyard as Summon: Esper Ramuh's first chapter ability resolves to determine how much damage is dealt
A rarer card will have much less supply, and rare cards are often the ones in demand for Constructed decks since theyre also typically stronger
Additional ethical monetization tips to consider Why is it so important to monetize ethically
But discarding two cards to draw four over two turns at instant speed seems really strong, and because you aren't spending two cards to do so but just one, this is card advantage unlike most of these effects, as you are our three cards (discard two, and the Revelation) to draw four, which is good math for a non-drawing color like Red
Finally, when Rancor cannot be attached to anything on the battlefield, it isnt put there at all
It comes equipped with everything a knight-themed deck needs to get started, but theres room for improvement