You're back to the beginning, except there are two damage counters in play
Creature - Zombie Assassin Creature (CTRL to add secondary) Enchantment Bandit's Talent (Gain the next level as a sorcery to add its ability.) When this Class enters, each opponent discards two cards unless they discard a nonland card
The mill from Tinybones Joins Up essentially turns Kroxa into an Escape 4, which makes it brutal for any midrange or control deck to try and grind through
If you're looking to get a head start, my Tier List on 17Lands can help you assess card strength and make informed build decisions
This is extremely solid, only requiring two Water-type Energy to administer
These earlier sets has everything turned into a creature type, but subsequent retcons and synergies would consolidate a lot of them together, like grouping all of the different birds and insects together