Those spells cost less to cast if you paid life this way
There was a brief period of time when this color trio was nicknamed Necra (Necravolver), and after that it was affectionately called Junk (as in: Jund, but replacing red with white makes it bad)
Dauthi Voidwalker An unblockable creature with three power for two mana is already pretty exciting for aggressive decks, as it'll come down early and do decent damage before it gets answered
Multiple times i've won the game with the sheer number of 4/4s you can make if you have the mana, and can win you the game if everyone's very late game, but too scared to attack one another in fear of a deadly retaliation, in my experience, happens often in more casual play
You'll need to have a consistent way to get more lands into your hand with other ramp effects to keep making use of her ability, but even without that, Azusa can catapult you ahead of your opponents in a single turn