Glacierwood Siege

When this enchantment enters, return up to one target instant or sorcery card from your graveyard to your hand.

Whenever you cast an instant or sorcery spell, draw a card. Then discard a card unless there are three or more Lesson cards in your graveyard.

Read ahead (Choose a chapter and start with that many lore counters. Add one after your draw step. Skipped chapters don't trigger. Sacrifice after III.)

I — You may cast an instant or sorcery spell with mana value 1 or 2 from your hand without paying its mana cost.

II — Target player mills four cards.

III — Exile target instant or sorcery card from your graveyard. Copy it. You may cast the copy.

Whenever you cast an instant or sorcery spell, put a charge counter on this enchantment.

, Remove two charge counters from this enchantment: Draw a card.

, Remove five charge counters from this enchantment: It deals 5 damage to any target.

(As this Saga enters and after your draw step, add a lore counter. Sacrifice after IV.)

I, II, III — Until your next turn, whenever you cast an instant or sorcery spell, target player mills cards equal to that spell's mana value.

IV — Draw a card. If a graveyard has twenty or more cards in it, draw three cards instead.

Whenever you cast an instant or sorcery spell from your hand, you may cast up to one target card of the other type from your graveyard. If a spell cast from your graveyard this way would be put into your graveyard, exile it instead.

Choose a Background (You can have a Background as a second commander.)

When this creature enters, you may exile a creature card from your graveyard. When you do, return target instant or sorcery card from your graveyard to your hand.