AI DraftFeb 26, 2026
Krenko, Mob Boss + Skirk Prospector + Staff of Domination
Overview
With Krenko, Mob Boss + Skirk Prospector + Staff of Domination you can create a repeatable loop that (once you have enough Goblins) produces arbitrarily many Goblin tokens and red mana and lets you use Staff abilities repeatedly. Krenko’s token generation counts Krenko itself (Ruling [2012-07-01]), sacrifices to Skirk are allowed even for Skirk itself (Ruling [2022-12-08]), and the interplay of tapping/untapping status is governed by .
Step 1
Setup: You control Krenko, Mob Boss (untapped), Skirk Prospector, and Staff of Domination (untapped). Count the number of Goblins you control before Krenko’s activation; call that g (Krenko and Skirk count toward g) — see Ruling [2012-07-01].
Step 2
Activate Krenko’s ability by paying its cost 
and let it resolve. It creates X = g 1/1 Goblin tokens, so after resolution you control 2g Goblins in total (original g plus g new tokens) per Ruling [2012-07-01].
and let it resolve. It creates X = g 1/1 Goblin tokens, so after resolution you control 2g Goblins in total (original g plus g new tokens) per Ruling [2012-07-01].Step 3
Sacrifice Goblins to Skirk Prospector to produce red mana as needed. Skirk can be sacrificed if you choose, but per Ruling [2022-12-08] do it last if you still need its repeated ability.
Step 4
Pay 
, on Staff of Domination and target Krenko with that ability to untap Krenko. That ability requires tapping Staff as part of its cost, so Staff becomes tapped; the untap effect will set Krenko’s status to untapped per .
, on Staff of Domination and target Krenko with that ability to untap Krenko. That ability requires tapping Staff as part of its cost, so Staff becomes tapped; the untap effect will set Krenko’s status to untapped per .Step 5
Pay 
to activate Staff’s ": Untap this artifact" ability (this ability has no in its cost, so it can be activated while the Staff is tapped). That untaps Staff so you can use it again next iteration. The 
used to pay and came from sacrifices to Skirk.
to activate Staff’s ": Untap this artifact" ability (this ability has no in its cost, so it can be activated while the Staff is tapped). That untaps Staff so you can use it again next iteration. The used to pay and came from sacrifices to Skirk.Step 6
After paying the two Staff activations above, you are back to the start: Krenko untapped, Staff untapped, and you have fewer Goblins than immediately after the token creation but the loop restores the ability to repeat.
Step 7
Net effect per iteration: start with g Goblins; after Krenko creates g tokens you have 2g; then you sacrifice 4 Goblins to pay and , leaving 2g - 4 Goblins. The iteration increases your Goblin count if 2g - 4 > g, i.e., if g > 4. Thus, with at least 5 starting Goblins the loop becomes expanding and can be repeated to produce arbitrarily many Goblins and, by sacrificing them, arbitrarily much red mana.
and , leaving 2g - 4 Goblins. The iteration increases your Goblin count if 2g - 4 > g, i.e., if g > 4. Thus, with at least 5 starting Goblins the loop becomes expanding and can be repeated to produce arbitrarily many Goblins and, by sacrificing them, arbitrarily much red mana.Step 8
Once you can produce as much red mana as needed (by growing your Goblin army), you can also tap Staff and pay 
, to draw a card; by repeating the loop and producing enough mana each time, you can draw arbitrarily many cards using Staff’s draw ability while continuing the loop.
, to draw a card; by repeating the loop and producing enough mana each time, you can draw arbitrarily many cards using Staff’s draw ability while continuing the loop.Resolution
Basic result: Tap Krenko to create X Goblins (X = number of Goblins you control per Ruling [2012-07-01]). Sacrifice some of those Goblins to Skirk Prospector for (you may sacrifice Skirk itself, but do it last if you need it later per Ruling [2022-12-08]). Use that to pay Staff of Domination’s activated abilities (,: Untap target creature and : Untap this artifact) to untap Krenko and Staff, returning you to the start of the loop. Tapped/untapped status and untapping effects are interactions of permanent status under . If you start a loop iteration with g Goblins, one iteration (tap Krenko, then sacrifice 4 Goblins to pay Staff’s and costs) leaves you with 2g - 4 Goblins; the iteration increases your Goblin count iff g > 4, so with at least 5 Goblins this becomes a growing (repeatable) loop. If you can generate enough red mana in a given position you can also pay , on Staff to draw cards repeatedly while continuing the loop.
(you may sacrifice Skirk itself, but do it last if you need it later per Ruling [2022-12-08]). Use that to pay Staff of Domination’s activated abilities (,: Untap target creature and : Untap this artifact) to untap Krenko and Staff, returning you to the start of the loop. Tapped/untapped status and untapping effects are interactions of permanent status under . If you start a loop iteration with g Goblins, one iteration (tap Krenko, then sacrifice 4 Goblins to pay Staff’s and costs) leaves you with 2g - 4 Goblins; the iteration increases your Goblin count iff g > 4, so with at least 5 Goblins this becomes a growing (repeatable) loop. If you can generate enough red mana in a given position you can also pay , on Staff to draw cards repeatedly while continuing the loop.Feedback