As a result, it's often better to let an attack through rather than risk losing Prosper to a post-combat removal spell or combat trick
If it lives to your next upkeep it allows you to put any creature from a graveyard into play under your control as a Phyrexian
They both start as 3/3s that get +1/+1 counters whenever you discard a card or draw a card, respectively
In the end, Teachings prevailed that time, but Ancient Grudge was on the scoreboard, and it appears to have been holding a persistent feeling of ill-will this whole time
One archetype in particular, Izzet Lessons, has just made a massive splash at the MTG World Championships
This tribe demonstrates why you do not let a group of lords, all pumping the same tribe, on the battlefield at the same time