Thats not entirely common in Boros, and essentially feels like it would reward the kind of group hug strategy that actually squeezes more draw out of a foe to give it to you
I won't go deep into each one, but they all have some form of cycling which can be a boon if drawn later in the game when you don't need them, or, of course, for cycling strategies (toss in a Fluctuator and burn through your whole deck.) Some produce colorless or single-color mana
When this artifact enters, tap all legendary creatures
To fill up your graveyard, Celes, Rune Knight and Mog, Moogle Warrior arrive with potent effects that get creatures into your graveyard, with the Celes also being her own wincon and value engine with her ability to grow your whole board every time a creature enters from your graveyard
Yes, Gadrak, the Crown-Scourge exists)
But the Ninth Doctors is perhaps the most offbeat