(Sorry Erika, the starters simply have too much power over market prices)
Over two turns a creature with exert has four different modes it can attack in on top of the option to not attack which is all other creatures ever get to do
Yuffie, Materia Hunter* Unlike most Ninjas, Yuffie doesnt need ninjutsu for her ability to trigger, instead she can just grab your opponents Sol Ring and grab it for yourself, while also moving equipment over to her - something that can be quite nasty with Ninjutsu
There's no time to evolve Buneary and attach three energy cards before all my other creatures are KO'd so I have to just go against Serperior unarmed and hope one of those coin flips fails
Loyalty abilities of planeswalkers are activated abilities
When played in the main phase, the lifelink you get for a turn can save your life in a pinch