calculation puzzle - Magic: the Gathering - Challenge #7: In Your Dreams

_{Previous Challenge}

Background

Normal MtG rules apply here. You may not assume that your opponent will cooperate with you (e.g. choose not to block any of your creatures when they can). Assume that your opponent will block the largest power creatures that they legally can with as many creatures as they legally can, regardless of whether or not it will kill their blockers (in the event of tied power, assume they choose to block the first of the tied attackers alphabetically). If you would draw a card, you may assume that you draw any card remaining in your library, regardless of shuffling.

Puzzle Setup

It's your main phase 1, you haven't played a land for the turn. You're being demolished by your opponent and they have you dead next turn: reverse the tides and win this turn! You've just cast Three Dreams and are about to resolve it. Good luck!

Your hand:
Nothing

Your board:
Nothing

Your graveyard:
Aura Shards
Auramancer
Eternal Witness

Your library:
Abduction
Animate Dead
Battle Mastery
Daybreak Coronet
Dragon Fangs
Dual Casting
Empyrial Armor
Enslave
Fallen Ideal

Field of Reality
Flight of Fancy
Galvanic Arc
Hammerhand
Infiltrator's Magemark
Mirror Mockery
Nature's Chosen
Necromancer's Magemark
Righteous Authority
Sisay's Ingenuity

Spirit Loop
Splinter Twin
Triclopean Sight
Vow of Malice
Vow of Wildness

Your life:
1

Your mana:
: 41
: 11

: 8
: 3
: 7
: 1

Opponent's hand:
Nothing

Opponent's board: (all untapped, summoning sick)
Aether Membrane
Arashi, the Sky Asunder
Drift of Phantasms

Pillar of War

Opponent's graveyard:
Nothing

Opponent's library:
60 Swamp

Opponent's life:
60

Opponent's mana:
Nothing

Answer

I feel like I found an answer far easier than intended. EDIT: Here's a solution that deals 78 damage.

Resolve Three Dreams (hand: 3 cards)
Cast Animate dead, returning Eternal Witness, getting back Three Dreams
Cast Three Dreams (hand: 5 cards)
32 C
9 W
8 U
2 B
7 R
1 G

Cast Hammerhand on Eternal Witness (trigger targets Drift of Phantasms). Cast Splinter Twin on Eternal Witness, activate it, get back Three Dreams
Cast Dual Casting on the Eternal Witness token, then cast Dual Cast Three Dreams (hand: 8)
25 C
8 W
8 U
2 B
2 R
1 G
Cast Triclopean Sight on the Twin Witness to untap it
Activate Twin for a token to get back Auramancer (hand: 7 + Aurmancer)

24 C
7 W
8 U
2 B
2 R
1 G
Play Fallen Ideal on the new Witness token.
Play Abduction on Twin Witness, untapping it.
Activate Twin, then with the trigger on the stack, sacrifice the Twin Witness to Fallen Ideal.
Abduction triggers, bringing back Eternal Witness, bringing back Abduction.

Splinter Twin resolves, you get a token, bringing back Three Dreams.
Board: Fallen Token (4/2), Dualcaster Token, Plain Token, Original Witness
Hand: 5 + Auramancer, Three Dreams, Abduction
20 C
7 W
6 U
1 B
2 R
1 G
Play Nature's Chosen on the Dualcaster, untap it.

Dualcast Three Dreams (hand: 10 + Auramancer, Abduction)
16 C
6 W
6 U
1 B
1 R
Sacrifice Original Witness to Fallen Ideal.
Cast Auramancer for Animate Dead.
Cast Animate Dead for Witness, for Three Dreams (hand: 10 + Abduction, Three Dreams)
Board: Fallen Token (6/3), Dualcaster Token, Plain Token, Original Witness, Auramancer

13 C
5 W
6 U
1 R
Cast Three Dreams (hand: 13 + Abduction)
Cast Battle Mastery, Righteous Authority, Empyrial Armor, Mirror Mockery on Fallen Token (hand: 9 + Abduction)
2 C
4 U
1 R
Cast Abduction on Auramancer

Sacrifice Auramancer (8/4), abduction triggers, bringing back Auramancer, getting back Hammerhand
Cast Hammerhand on Fallen Token, trigger targets Aether Membrane (hand: 9)
Attack with Fallen token (opp has no flying blockers because of Hammerhand triggers), Mirror Mockery triggers, token gets back Three Dreams (hand:10)
Sacrifice all five creatures, attacker is 2 base + 16 Ideal + 1 Hammerhand + 10 Armor + 10 Authority. 78 damage with Double Strike.

@NeedAName mentioned that this solution is easier than intended because Arashi doesn't have flying, you can adapt this solution to beat a flying Arashi by Witnessing back Abduction instead of Three Dreams and Abducting the opponent's Arashi (you lose 8 damage, but the solution can then be optimized to save a bit of mana so that you can cast Flight of Fancy for the draw 2, so you only lose 4 damage).