The Battlefield

Basalt Monolith

$4.35

Forensic Gadgeteer

$2.01

AI DraftApr 12, 2026

Basalt Monolith + Forensic Gadgeteer

AI draft — not yet human-reviewed. Check citations and flag anything that looks wrong. How pages are reviewed.

Overview

With Forensic Gadgeteer and Basalt Monolith under your control on the battlefield, Forensic Gadgeteer reduces Basalt Monolith’s activated untap cost from {3}

, so you can tap the Monolith for {C}

and pay

to untap it, netting {C}

each loop and producing an unbounded amount of colorless mana. Forensic Gadgeteer’s reduction only affects activated abilities of artifacts you control on the battlefield , and Basalt Monolith’s untap ability can be activated as often as you can pay for it ; activation of activated abilities is governed by .

Step 1

Have Forensic Gadgeteer and Basalt Monolith on the battlefield under your control (artifacts on the battlefield per ).

Step 2

Because Forensic Gadgeteer’s static ability reduces the activation cost of activated abilities of artifacts you control by {1}

(but not below one mana), Basalt Monolith’s “ {3}

: Untap this artifact” is reduced to {2}

while both are controlled by you .

Step 3

Tap Basalt Monolith for {C}

using its “ {T}

: Add

” ability.

Step 4

Pay

to activate the Monolith’s untap ability (now {2}

: Untap this artifact) and resolve that activation to untap the Monolith; activation and resolution follow the rules for activated abilities .

Step 5

Repeat steps Tap and Pay as desired. Each loop produces {C}

and costs

to untap, netting {C}

each iteration, so you can generate arbitrarily large amounts of colorless mana by repeating the loop .

Resolution

If you control both permanents, Forensic Gadgeteer makes Basalt Monolith’s “ {3}

: Untap this artifact” cost {2}

to activate (Forensic Gadgeteer’s static reduction applies to activated abilities of artifacts you control on the battlefield) . You may then tap the Monolith for {C}

and pay

to untap it, repeating the sequence to gain one net {C}

per loop and therefore generate an arbitrarily large amount of colorless mana (Basalt Monolith’s untap ability may be used as often as you can pay for it) and subject to normal activation timing and priority rules .

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