pokemon munna card - (48) Common Retreat cost Pokemon » Munna - 035/086

Then every single instant-speed spell in your hand essentially becomes its protection

A five mana 4/4 is nothing to write home about, and +4/+4 is quite a big bonus when it enters the battlefield, but in a format full of Nissa, Voice of Zendikar and Gideon, Ally of Zendikar, chump blocking is a pretty normal occurrence

Thats what happened with Phyrexian mana and its now mostly considered a design mistake thanks to exactly that

(Unless you're Ken Nagle, in which case you do it right to left.) However, there's an important distinction to make here: you need to see what you're actually going to want to cast at each mana cost, not what you can cast at each mana cost