Both will slowly gain counters over the course of the game as we play enchantments or creatures die and are great targets for our proliferate effects as well
The only thing holding these back is that theyre essentially sideboard cards, albeit really good ones situationally
While obviously imperfect, Its at least a barrier
Monsters Tributed while Lair of Darkness is in play will find no rest in the Graveyard their souls will return to the field at the end of the turn in which they were Tributed
With the ability to heal damage from one of your Pokemon, as well as deal 150 damage to your opponents while both confusing and poisoning it, Venusaur ex is for sure a card youd fear going up against
When you factor in the addition of more and more relevant flash cards, with Reprieve and Cathar Commando headlining recent printings, theres a lot to like here