Irrigated Farmland Is a Mountain, a Forest, and a Plains
You can manifest any card, and a poor draw could mean terror with no payoff, but typically, it will be a creature card that gets manifested, and that means a surprise beastie to fend off
The Base Set artwork of Pikachu features him standing in a forest while shooting lightning bolts from his cheeks and they are yellow
Meanwhile, Song-Mad Treachery is a card I really like for a reason similar to Pelakka Predation: people don't expect non-sacrifice decks to have Threaten effects, which means that Song-Mad Treachery can lead to some massive blowouts by stealing an unsuspecting opponent's best creature and smashing them with it
Glorious Sunrise I love this green enchantment, maybe more than it deserves