mtg black life gain cards Arena - White | Amalia Benavides Aguirre each opponent loses X life Gray Merchant of Asphodel

It's not a ritual and it does give your opponents ramp as well, but in Red to be able to burn all players each upkeep and ramp into bigger spells on your turn is perfect

There are some commanders out there that can be a huge help with getting your dragons out nice and early so you can hit some faces

1 Kheru Spellsnatcher

A 2/2 with daybound that can't be countered, Howlpack Piper can be tapped for two mana to put a creature from its owner's hand directly onto the battlefield, immediately untapping itself if that creature was a werewolf or wolf

Alternatively, you can also use Gogo to copy powerful creature abilities like Agent of Treacherys entry trigger, stealing multiple permanents at once