But, in the end, they were cut to make space for other mechanics
You can repeat this as long as you want
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
Spend this mana only to cast an instant or sorcery spell or to gain a Class level." : Level 3 Whenever you cast an instant or sorcery spell, that spell deals damage to each opponent equal to the number of instant and sorcery spells you've cast this turn
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
Nest of the Hydra may generate a vanilla creature, but is about the best mana sink a Green deck could ask for