Ive played for nearly 15 years, starting with the equivalent of kitchen tables in college, moving into competitive Standard and Extended around Lorwyn and Shards of Alara, and then ending up back at the kitchen tables afterward
Cards in your hand are known only to you, which is an advantage
But before we just go down the avenue of -1/-1 counters, like sliding in Hapatra, Vizier of Poisons and and Archfiend of Ifnir, think about the idea of using other kinds of counters, even +1/+1 counters that make your opponents creatures better
It's not an ethical thing, or even self-preservation in the face of ADHD-driven overconsumption, I'm just pessimistic about my luck
Deathrite Shaman Deathrite Shaman sees heavy play in formats where it's still legal, and its one of the best 1-drops ever