[24] [25] Cyclopean Tomb had no casting cost, instead of a casting cost of 4
Songs like Be Prepared can completely reset the field, while Steels sturdy characters stand their ground, forcing your opponent into bad trades
It doesn't matter that it's five total mana to cast
If you really want a 1/1 creature for four mana that regenerates in black, I can offer you Darkling Stalker, which outclasses Numai Outcast in every way that counts
Examples of active card draw are Friends on the Other Side, Merlin Rabbit, Maleficent Sorceress, Magic Mirror, The Queen Wicked and Vain, Ursula Power Hungry (I mean assuming they have at least one lore...), A Whole New World, Gaston Intellectual Powerhouse, Donald Duck Perfect Gentleman, and even Ariel Spectacular Singer or Be Our Guest
Along with that, you can pay six mana to make each opponent with no cards in hand lose ten life