Im going to take you through the best red creatures that the game has to offer, focusing on only mono-red creatures and ignoring digital cards created for MTG Arenas Alchemy format
We buy almost everything Pokmon vintage Base Set rarities, modern chase cards from Scarlet & Violet, sealed booster boxes, individual rares, and yes, even bulk commons and uncommons (those go by the thousand)
The full list of login rewards is: Day 1: Obelisk the Tormentor (Alternative Art) in Royal Finish Day 2: 500 Gems Day 3: The Ones Who Serve Ra Secret Pack Ticket Day 4: 300 Gems Day 5: Obelisk the Tormentor (Alternative Art) Icon Day 6: The Ones Who Serve Ra Secret Pack Ticket Day 7: 200 Gems Soar into the sky with the Yu-Gi-Oh
#5 Mega Venusaur ex SAR (8,500 / ~$57) Covered in detail above
By limiting yourself to Orzhov cards, you miss out on a lot of great legendary creatures that Arvad could be buffing