If the target creature is a token, the ability still triggers when it dies, but you won't return the token to the battlefield because it'll cease to exist when state-based actions are checked
Ill try to avoid suggesting obvious format stapleslike putting Tatyova, Benthic Druid in the Sultai deckinstead going for some more outside-the-box ideas
Table of Contents show How Does Undying Work
This card shifts the game from a runaway train piloted by one ahem green player, to a game where everyone has the same number of lands out and can thusly enjoy the experience
This lines up exactly with the reveal of Katara, the Fearless, so its safe to assume this was what caused such a rush of interest
In short, if you are going to play Modern anytime soon either play Eldrazi or find a way to beat them