AI DraftFeb 26, 2026
Elvish Archdruid + Umbral Mantle
Overview
If you control Elvish Archdruid equipped with Umbral Mantle, you may tap Elvish Archdruid for green mana using its 
mana ability (this is a mana ability and doesn’t use the stack) [Ruling 2011-09-22], then activate the ability granted by Umbral Mantle by paying 
and the untap cost (
) to untap Archdruid as a cost [2008-05-01] and give it +2/+2 until end of turn; because Umbral Mantle grants the ability to the equipped creature, the creature’s controller is the one who may activate that ability .
mana ability (this is a mana ability and doesn’t use the stack) [Ruling 2011-09-22], then activate the ability granted by Umbral Mantle by paying and the untap cost () to untap Archdruid as a cost [2008-05-01] and give it +2/+2 until end of turn; because Umbral Mantle grants the ability to the equipped creature, the creature’s controller is the one who may activate that ability .Step 1
Ensure Umbral Mantle is attached to Elvish Archdruid (it is the equipped creature) .
Step 2
Activate Elvish Archdruid's mana ability to add 
for each Elf you control; this is a mana ability that doesn't use the stack, so it resolves immediately and you cannot respond to its activation [Ruling 2011-09-22]; note that the mana amount counts Archdruid itself among your Elves [Ruling 2009-10-01].
mana ability to add for each Elf you control; this is a mana ability that doesn't use the stack, so it resolves immediately and you cannot respond to its activation [Ruling 2011-09-22]; note that the mana amount counts Archdruid itself among your Elves [Ruling 2009-10-01].Step 3
With the mana now in your mana pool, activate the ability granted by Umbral Mantle on the equipped Archdruid by paying and the untap cost (). As part of paying that cost you untap Archdruid (the untap is a cost and can’t be responded to) [Ruling 2008-05-01]; the ability then goes on the stack.
and the untap cost (). As part of paying that cost you untap Archdruid (the untap is a cost and can’t be responded to) [Ruling 2008-05-01]; the ability then goes on the stack.Step 4
When the Mantle ability resolves it gives Archdruid +2/+2 until end of turn.
Step 5
If after tapping Archdruid you produced N green and N > 3 (i.e. 4 or more Elves total), you have net positive green (N−3) left in your mana pool and can repeat the sequence to generate arbitrarily large amounts of green mana.
Resolution
Sequence and outcome: Tap Elvish Archdruid to add for each Elf you control (this is a mana ability that doesn’t use the stack) [Ruling 2011-09-22] and note that Archdruid’s mana ability counts itself among Elves you control [Ruling 2009-10-01]. With that mana in your mana pool, activate the equipped creature’s Umbral Mantle ability by paying and the untap cost (); as part of paying that cost you untap Elvish Archdruid (the untap as a cost can’t be responded to) [2008-05-01], the ability then goes on the stack and (when it resolves) gives Archdruid +2/+2 until end of turn. Because Umbral Mantle’s text gives the equipped creature the ability (it “has” the ability), the equipped creature’s controller is the only player who may activate it . If Elvish Archdruid taps for N green and N > 3 (i.e. you control 4 or more Elves including Archdruid) this creates a net gain of N−3 green each cycle, enabling you to repeat the tap/activate/untap cycle to produce arbitrarily large amounts of green mana (an infinite-mana loop under those conditions) [Ruling 2011-09-22] [2008-05-01] [Ruling 2009-10-01].
for each Elf you control (this is a mana ability that doesn’t use the stack) [Ruling 2011-09-22] and note that Archdruid’s mana ability counts itself among Elves you control [Ruling 2009-10-01]. With that mana in your mana pool, activate the equipped creature’s Umbral Mantle ability by paying and the untap cost (); as part of paying that cost you untap Elvish Archdruid (the untap as a cost can’t be responded to) [2008-05-01], the ability then goes on the stack and (when it resolves) gives Archdruid +2/+2 until end of turn. Because Umbral Mantle’s text gives the equipped creature the ability (it “has” the ability), the equipped creature’s controller is the only player who may activate it . If Elvish Archdruid taps for N green and N > 3 (i.e. you control 4 or more Elves including Archdruid) this creates a net gain of N−3 green each cycle, enabling you to repeat the tap/activate/untap cycle to produce arbitrarily large amounts of green mana (an infinite-mana loop under those conditions) [Ruling 2011-09-22] [2008-05-01] [Ruling 2009-10-01].Feedback