There is enough token support to make Kykar viable for Limited, and you now have a source of generating mana and a creature boardstate in your command zone, which feels strong in a Limited environment
If you want to play a relatively fair and interactive deck, Tatyova, Benthic Druid is a great choice
Again, grab the mana-screwed foe and they can discard three or four expensive things they cannot cast for lands or hit the mana-flooded person who can discard lands for good stuff and can thus play the game
Tarmogoyf, for example, is an amazing card that, at one point, dominated multiple formats
FINAL FANTASY , the first Standard-legal Universes Beyond set, is less than two weeks away from release
Thief gets particularly crazy with common clone effects, like Phantasmal Image, Sakashimas Student, and the best Ninja from the set