Once exerted, that ability cant be used again that turn
Theres not too much else to say about tiered, as the mechanic only appears on a handful of uncommons and commons, notably Thunder Magic
Barring that, his Evasive attribute will keep him protected from most attacks, and his five willpower will keep him out of range of most chip damage cards such as Grab Your Sword and Smash
It still boggles my mind how Lorcana creators could have built the Inking system into the game as a way to keep the game balanced but also added the insane cards to Sapphire that it has, making it possible for players running that Ink type to add so many cards to their Inkwell and add so many more options to their deck than any other combo is capable of
There's also Helm of the Host for a more permanent alternative, Sword of Feast and Famine to untap all your lands twice for peak combat trickery, and Sword of Wealth and Power for lots of spell copying and Treasure tokens
There are cheaper and slower alternatives, such as Mountain Valley, a $0.30 card that functions the same way, but enters tapped