More importantly, from a purely cynical point of view, they're ripe for cross-promotion
If you can dump a ton of +1/+1 counters on Aerith, she could be a good addition to your Commander deck
MH2 is a very enjoyable Draft experience with compelling archetypes, lots of options in Draft, strong balance between aggro and control, and interesting gameplay with lots of room for skilled players to win games
The strength of Summon: Choco/Mog is that it only costs three mana
Power level/strength Obviously power level matters - you want effects that can blow your opponent's socks off
It feels much like Sea Gate Restoration in the sense that you play it because its a land that might do something if you run out of gas late in the game, but you dont really plan to cast it if everythings going well