These wont prevent cards from going into Exile, but they allow you to at least do something with them after that point
Being an instant also lets you leverage the ability by holding up countermagic, card draw, or bouncing your opponents board states to remove all blockers before your turn
There is one more archetype that steel enables, which I briefly mentioned in the emerald section above Mill
To determine the total cost of a spell, start with the mana cost or alternative cost you're paying (such as a flashback cost), add any cost increases (such as kicker costs), then apply any cost reductions (such as that of The Darkness Crystal's first ability)
All Will Be One #118 Phyrexia: All Will Be One Change Version All Will Be One Enchantment Whenever you put one or more counters on a permanent or player, All Will Be One deals that much damage to target opponent, creature an opponent controls, or planeswalker an opponent controls