Boon Satyr is a threat that can evolve your creatures at instant speed while Become Immense can win the game out of nowhere
Their play points - spent to play cards, like mana - meanwhile, will start at two rather than zero
If you really want to go all-in on ramp, you can explore a whole spectrum of expensive green ramp cards from the relatively tame Nissas Renewal to the truly monumental Reshape the Earth
Wear Down At the cost of , Wear Down is a good way to destroy two artifacts
There are 204 cards in the main set, with 12 more Enchanted to find, making a total of 216
Many notoriously expensive MTG cards have experienced this, from Tarmogoyf to the ten shocklands, but their prices usually go down with reprints