Some triggered abilities state that you "may pay" a certain amount of {E}. You can't pay that amount multiple times to multiply the effect. You simply choose whether or not to pay that amount of {E} as the ability resolves.
Riparian Tiger
If an effect says you get one or more {E}, you get that many energy counters. To pay one or more {E}, you lose that many energy counters. You can't pay more energy counters than you have. Any effects that interact with counters a player gets, has, or loses can interact with energy counters.
Energy counters are a kind of counter that a player may have. They're not associated with any specific permanents.
Magic: The Gathering · ™ & © Wizards of the Coast · Illus. Igor Kieryluk
Card data via Scryfall. Rarix is fan-made; not endorsed by the rights holders.
