In a deck that might not have access to black removal, Encase in Ice is likely to be very important
Of course, this means you need a character on board that can initiate the challenge before Maid Marian gets value, but there are 11 4-cost characters that all have decent Strength values, so it isn't hard to get something down the previous turn that can take the Challenge
Triton Cavalry Oh, Theros block and its enchantments
Different types of tournaments were created allowing only cards easily found by all players
As Evelyn does not have a restriction on what cards she can play, she can easily turn opponents instants into useful effects that she can cast each turn
We all know that the premise of Magic is that we as players are powerful Planeswalker battling it out by using our mana resources to cast spells, but I have rarely felt that way during a game