Calix, Guided by Fate is a mythic Legendary Enchantment Creature — Human Druid card from March of the Machine: The Aftermath (MAT), collector number 26. Current market price: $12.92 (foil $12.55), TCGplayer market prices via Scryfall.
Constellation — Whenever Calix or another enchantment you control enters, put a +1/+1 counter on target creature. Whenever Calix or an enchanted creature you control deals combat damage to a player, you may create a token that's a copy of a nonlegendary enchantment you control. Do this only once each turn.