Generally speaking, sticking to the minimum deck size is the way to go
Instead, Saga creature cards balance that big impact with temporary presence, dependably swinging the pendulum of pressure back to your opponent after all, you paid mana for something that goes away eventually but presents an interesting dilemma: Does your opponent block it
The higher-level ones though, can inflict status ailments like Berserk and Confuse, and can also drain levels, making them similar to their namesakes from Dungeons & Dragons
The flexibility is great, but holding four mana up for interaction is admittedly easier at more casual tables, which probably accounts for why this card doesnt show up very often
For that much, you could just pick up a copy of Pokemon FireRed or ten
Following that, those selected only had a specific window during which the card could be bought