Around the 10min mark, player plays Field of Ruin from graveyard with their first Serra Paragon in the game. They the play a second Serra Paragon, but the land never leaves the battlefield until the 15min mark, when it is sacrificed and the player gains 4 life from two triggers going onto the stack.
This can be seen happening here: https://youtu.be/KMqyZ17KfN8
Around the 10min mark, player plays Field of Ruin from graveyard with their first Serra Paragon in the game. They the play a second Serra Paragon, but the land never leaves the battlefield until the 15min mark, when it is sacrificed and the player gains 4 life from two triggers going onto the stack.