Call the Spirit Dragons (all versions)

Oracle Text: Dragons you control have indestructible. At the beginning of your upkeep, for each color, put a +1/+1 counter on a Dragon you control of that color. If you put +1/+1 counters on five Dragons this way, you win the game.

Flavor Text: The essence of Tarkir was shaped into draconic embodiments of the re-formed clans.