Odin, all father

+1: Create a random Rune Stone artifact token.
+3: Create a 4/4 legendary horse creature token named Sleipnir, with flying, first strike and steed.
-7: Create 2 1/1 Odin's raven creatures with tap this creature scry 1. You get an emblem with at the start of your turn creature 2 random Rune Stones