This has another double spell mechanic
From card draw through cards like Thoughtcast to mana fixing through artifacts like Gruul Signet and the enchantment Weirding Wood, the nuts and bolts common and uncommon cards in this deck are always trying to either help you get artifact tokens onto the battlefield, or rewarding you for having artifacts
Im still miffed about party not being tied in with the set more significantly, but I love the dungeons and the dragons, so Im sure Ill find it in my heart to forgive this oversight.
When a legendary creature you control attacks and isn't blocked, if Senu is exiled, put it onto the battlefield attacking
Anytime an opponent casts a spell with mana value equal to the number you pick, or they cast a creature with either power or toughness equal to the number you picked, that player loses two life and you get to draw a card