These are the classic ways to turn creatures entering the battlefield into an actual wincon, and they're mainstays in token decks and burn decks alike
For example, if a card says Whenever a creature dies, investigate, the triggered ability is the part that starts with whenever
Aether Channeler, Sea Gate Oracle, Watcher of Tomorrow, Couldblazer, Augur of Bolas, and many more not only draw you extra cards, but in many cases let you take your pick of cards from the top of your deck
I don't much like it as it is just something that can randomly win you games but that has no real synergy or interaction with your own cards
5x Mountains
The Adventure is an instant or sorcery that occupies the lower-left quadrant of the card