On the note of budget, each wildcard costs the same and is earned the same way in their given rarities, thus, if you spend a wildcard on a super expensive common or mythic, you can play with cards that would cost a fortune IRL
This serves as a powerful card selection engine that also synergizes beautifully with delirium, where sending different card types to the graveyard is key to victory
I mean, I can understand that somewhere, someone designed this card thinking that often you would add X mana to your pool and not be able to use it, with mana burn ensuing
Nest of the Hydra may generate a vanilla creature, but is about the best mana sink a Green deck could ask for
A card like Solemnity stops creatures from getting counters, so an undying creature always returns to play sans +1/+1 counter