mtg draw card opponent loses life Barbed Servitor (398) – Axion Now It increases once on each of your turns when an opponent loses life Ravenous Amulet - Foundations -

Sorcery Tutor (CTRL to add secondary) Maybeboard Bloodchief Ascension At the beginning of each end step, if an opponent lost 2 or more life this turn, you may put a quest counter on this enchantment

A lot of the times, you will actually be sacrificing your creatures to trigger specific effects

According to EDHREC data, there are 108,378 aristocrat decks in their database

Acidic Slime and Scavenging Ooze are the most appropriate and appear in most modern lists

At a casual or precon-level table, absolutely

Blue-Red Delver quickly became the tier zero deck in Modern thanks to the card advantage that Treasure Cruise offered, and within a few months, the spell had to be banned in Modern and in Legacy and eventually restricted in Vintage as well