Zirda-Bladegraph discount?

Modern Casual Equip RBW (Mardu)

Taida

Creature (16)

• 4x Bladegraft Aspirant
• 1x Foulmire Knight
• 2x Selfless Samurai
• 1x Skullcap Snail
• 2x Eiganjo Exemplar
• 1x Merry, Esquire of Rohan
• 4x Zirda, the Dawnwaker
• 1x Zoyowa Lava-Tongue

Sorcery (5)

• 4x Angelfire Ignition
• 1x Fatal Grudge

Planeswalker (1)

• 1x The Wanderer

Land (22)

• 7x Mountain
• 6x Plains
• 4x Swamp
• 1x Bloodfell Caves
• 1x Nomad Outpost
• 3x Uncharted Haven

Artifact (8)

• 2x Bladehold War-Whip
• 4x Bronze Cudgels
• 1x Hexgold Halberd
• 1x Knife

Instant (6)

• 1x Acrobatic Leap
• 2x Anoint with Affliction
• 1x Infuriate
• 1x Shock
• 1x Thrill of Possibility

Enchantment (6)

• 2x Angelic Gift
• 2x Crackling Emergence
• 2x Etali's Favor

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Sideboard

Creature (3)

• 2x Geological Appraiser
• 1x Skullcap Snail

Instant (2)

• 1x Brute Strength
• 1x Kindled Fury

Sorcery (1)

• 1x Banishing Slash

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The combo uses Bladegraft Aspirant with Bronze Cudgels equipped. In theory, with Zirda, the Dawnwaker in play, both discounts should make the equipment's activated ability cost {0}, but I am not sure if the discounts can be stacked this way, as Zirda, the Dawnwaker's discount has a lower cap to the mana cost, but Bladegraft Aspirant's discount does not look to have a cap, so I really do not know how it would work.

The deck itself was made just with cards I had to prove the concept, but as I noticed the problem above, I did not continue with it.

Date added	9 months
Last updated	8 months
Legality	This deck is Modern legal.
Rarity (main - side)	9 - 0 Rares 15 - 3 Uncommons 22 - 3 Commons
Cards	64
Avg. CMC	2.21
Tokens	On an Adventure, Rebel 2/2 R, Samurai 2/2 W