If you wanted to invent an entire line of Pokmon- ex like thatBulbasaur ex , Ivysaur ex , Venusaur ex then they would need to specifically state Evolves from Bulbasaur ex and Evolves from Ivysaur ex
It might be appropriate for current Standard, but when it comes to Commander
To mitigate this, you now cant special summon this card from the graveyard the same turn it was sent there
Thought Scour, while more of a constructed enabler in Pauper and Modern, is in a similar playability boat at around $0.40
Slime Against Humanity creates a 0/0 Ooze creature token with trample when you cast it, putting 2+X +1/+1 counters on it, with X being the number of cards in your graveyard or exile with the Ooze creature type or with the same name as Slime Against Humanity
Instead of your opponent hitting you for big damage, they take the damage themselves