The massive card flow that people want for free in Commander and multiplayer lead them to attack each other, but not you, especially since they don't have to spend a card to get the card draw, so for them, this is free card advantage over time for each foe that attacks each other, and you'll draw more than the card it took to cast him in one or two turns
With Abyss Proxy Shop, you can play with Mystical Tutor and every legendary Commander staple you need all without spending a fortune
We'll be forced to keep opponent's Life cards at a certain number to find value from OP05-102-gedatsu
7 Elven Chorus Many creature-based decks already contain a handful of these kinds of effects so why not add one more
Cards like Ajani's Pridemate only buff themselves, but others like Nykthos Paragon and Lathiel, the Bounteous Dawn spread counters around the team
But again, the point isnt necessarily to optimize