Think people are under rating Vanndar. Says nothing about spells. You can use spells to get you through the early game. Vanndar is very similar to Old Barnes during Big Priest high point in Wild and we all know how that went. This can easily be the most complain about card in the game. I can see many games where you get Vanndar on curve and the game is over the other player just can’t keep up with the amount of mana cheat.
Also notice how it doesn’t specify mana reduction to just deck so anything you already have in hand will get the reduction so even if you don’t get it on curve and have something to keep up you can easily Play it later such as turn 6 with a 2 mana 5 drop.