Polluted Delta: Can search for an Island or Swamp, making it able to find lands such as Underground Sea, Tropical Island, Volcanic Island, Tundra, Bayou, Badlands, or Scrubland depending on the type needed
Custom Handmade Najeela, the Blade-Blossom proxies made from real Magic the Gathering card with many different alternated arts available for purchase.
There aren't a lot of good answers to four-Willpower characters though, so in a lot of cases Don Karnage can run away with a game all on his own
Jenova, Ancient Calamity Jenova is frankly a disappointment here in her card, which fits how she is in Final Fantasy 7 too, all hype but overshadowed by Sephiroth almost all the time