All those cards would be considered a Historic spell
I subconsciously understood that if we were designing cards for players, it was important that we understood the psychology of those players
Where do Lessons see play
Fodder Launch, Tarfire, Warren Weirding, Goblin Grenade, Goblin Shrine and Goblin Caves, Mogg Infestation, Brightstone Ritual, Goblin Warrens, Goblin Burrows, Goblin Trenches, Goblin War Strike, Moggcatcher, and more
You'll find plenty of burn spells to clear the way, anthem effects to pump up your creatures, and sacrifice synergies to keep the advantage
If it doesn't automatically happen when you the spell is cast, when does Discover take effect