mtg 60 card deck how many creatures to Build a Magic: The Gathering (for Beginners) I have already asked this

Beginning Phase of a Turn Ready Ready your exerted cards by turning them upright

This allows for shenanigans with any artifact that has built in cost reduction mechanics like Myr Enforcer or Metalwork Colossus, potentially turning a card that costs nothing into a defensive fortress like Darksteel Forge or a deadly finisher like Blightsteel Colossus for hilariously discounted rates

In fact, he achieved a rare feat: he collected a full set of thirteen warlocks, all of them descended from one of the first thirteen warlocks who made pacts with Asmodeus, the ruler of the Nine Hells

Fairly normal

The trigger event happens, then the ability goes on the stack , then it resolves

Discard only works from your hand