Mentor (Whenever this creature attacks, put a +1/+1 counter on target attacking creature with lesser power.) Whenever a nontoken creature you control dies, if it had counters on it, create X tapped 2/1 white and black Inkling creature tokens with flying, where X is the number of counters it had on it
You can make this go that much further to being one-sided by running a bunch of Vigilance, or putting into the flavor-of-the-month deck: a vehicles deck
While its true youre going down on life, a dedicated mill deck thats looking to win from the graveyard absolutely would play an effect that said mill a card, if its not a land, lose a life for as much mana and in this case, life as theyre willing to spend
[[Jhoira's Familiar]] is the better of the two
4 Mage Slayer + Jumbo Cactuar Make Sure It Hits Less of a silly combo and more of an assurance, Mage Slayer is a powerful but often overlooked piece of equipment by many Magic players