If thats not enough, you also put a +1/+1 counter on Kathril for each of those counters
Gardevoir ex can be teched in many different ways, but heres a decklist to get you started, inspired by the one that got second place at the Aichi Champions League
While in play, Convergence of Dominion's first ability, Dynastic Command Node, reduces the cost of activated abilities of cards in your graveyard by two generic mana to a minimum of one, so long as you control your commander
And, of course, the game's popularity can affect the value of cards
This can actually have some pretty interesting gameplay applications, particularly in green where you might have the biggest creatures and this will clear out small utility creatures or other weaklings that might get in their way