Malzahar vs tanks question
So I've been playing Malz for a bit now and I've played a lot against tanks and what not so my build ended up with like 40% cdr about 700 AP and 50/40% magic penetration. So I use my ultimate on tanks, who barely have any mr, like I faced a Garen who only had mercury treads, and I barely touched them. I had basically all of the magic pen items and enough power to do damage, but it did nothing. And it wasn't just vs Garen, it has happened over and over. Is there something I'm missing?