The tokens that Wilhelt makes have decayed, a new mechanic that means they cant block, and if they attack they will sacrifice themselves at the end of combat
Convoke, delve (Each creature you tap while casting this spell pays for or one mana of that creature's color
As an attack trigger, it makes me think of Sphinx of Forgotten Lore as more of an aggressive card for playing with combat tricks
Final Thoughts As you can see from this article, there are no shortages green card draw spells
$4.99 Red Elemental Blast 3rd Edition $0.39 Fireball 3rd Edition $4.99 Kessig Flamebreather Innistrad: Crimson Vow $1.79 Highway Robbery Outlaws of Thunder Junction $12.99 Pyroblast Ice Age $2.79 Strike It Rich Modern Horizons 2 $4.99 Dark Ritual 3rd Edition $1.29 Blue Elemental Blast 3rd Edition $3.49 Fireblast Visions $1.99 Goblin Bushwhacker Zendikar $1.49 End the Festivities Innistrad: Crimson Vow $0.39 Abrade Secrets of Strixhaven Mystical Archive
It delivers direct damage, fast creatures, and explosive plays