Greatwar of Praag

Instants and sorceries cost {3} less. Whenever a player plays an instant or sorcery, they lose 2 life.
Creatures cost {3} less, but whenever a player casts a creature spell, put a -1/-1 counter on each other creature.
The greatest warriors don't last long, The smartest sorcerers never learn much and peace is fleeting fantasy in the city of Praag.