Damage can be dealt to battles, and damage dealt to a battle causes it to lose that many defense counters
God Packs are even rarer: These packs contain the SAR and AR of a complete evolution line (like Venusaur, Ivysaur, Bulbasaur)
If your deck needs cheap artifacts, you could probably do worse, but I dont think youd play Sage's Nouliths otherwise
If Curie is no longer on the battlefield when its first ability resolves, use its base power as it last existed on the battlefield to determine how many cards to draw
You can pay some life and draw lots of cards in a single turn because you can activate the hellbent ability (no cards in hand) as many times as you have extra mana or life to pay
Now, Ill admit, the Izzet control decks are taking a big hit this rotation losing many great lands and interaction, but Impulse is one of the better card advantage spells out there, and this is certainly something to watch