Rhoda, Geist Avenger looks to generate +1/+1 counters off of Timin, Youthful Geists free tap-down each combat phase
This helps you plan your future turns and play around their strategy and alter yours so you don't play into certain spells
First, he lets you play an additional land on each of your turns, and he draws you a card whenever a land enters the battlefield under your control
Like most Pokmon cards, the value of Mega Gardevoir ex depends on a few consistent factors: its rarity, the printing and finish (regular or foil), its physical condition, and the set it was printed in (Mega Evolution)
So in a theoretical offensive situation, you can perhaps transform another battle with it, while pinging a potential defender to push more damage to any other relevant target(s)