This doesn't mean you should entirely ignore cards that cost less than four mana as there will always be some room to cast one, two, or three-mana spells, but you can afford to push your deck into the higher-costed cards with Ruby at the helm
Hopefully they dont have any responses to remove this creature
Blood Token illustrated by Magic Artist Peter Mohrbacher
9: Agent of Treachery Agent of Treachery has a very high mana cost, but it is absolutely worth it
I can play elves and faeries far more often than Mothman can attack, and getting to cast spells for free is almost always better than +1/+1 counters
Of the three-color combinations, Jund - the identity of black, green, and red - is often known for its combination of aggression, land synergies, and removal