Whenever a permanent an opponent controls is put into a graveyard, put that card onto the battlefield under your control unless that opponent pays 3 life. Suddenly every lost permanent is a potential ally for you, and if not, your opponents have to lose life just to stop you from stealing their stuff
1 Shrine of the Forsaken Gods
These provide more targeted removal while your forced sacrifice creatures can help clear out the weaker creatures
Then the enchantment also costs three, and this time the ETB is for dorks with a cheap three mana cost instead of smaller powers, which are typically the same stuff, and then you draw without mana, but again, just once per turn like the Vampire
Purphoros, God of the Forge, skinned as Kefka Palazzo, definitely fits the mold
Skittering Cicada is the insect version of that, and it works wonders in decks like Ulalek, Fused Atrocity that benefit from creatures entering at instant speed