If Nadu somehow enters the battlefield while a spell or ability that targets a creature you control is on the stack, the ability granted by Nadu won't trigger since that creature didn't have that ability when it became the target of that spell or ability
That said, there is a big of good news: right now, the basic lands from Theros: Beyond Death are selling for around $0.50 each
Zone or 99: 99 Shelob, Child of Ungoliant Okay, but here we have a cool ability that can be relevant in every game
Still, it has staple cards like 001-198-grab-your-sword and 001-197-fire-the-cannons which are popular damage dealing actions to include in any Steel deck
What does each of these cards do for you in the future of this game
Do it every turn, and the advantage adds up quickly