Undercover Operative
Felidar Guardian

   Prerequisites

What do I need to start this combo?
Felidar Guardian on the battlefield.
Undercover Operative in hand.
You have enough mana to cast Undercover Operative.

   Steps

How does this combo work?
1
Cast Undercover Operative by paying its mana cost, choosing to have it enter the battlefield as a copy of Felidar Guardian
2
When Undercover Operative enters the battlefield, it triggers, blinking Felidar Guardian.
3
When Felidar Guardian enters the battlefield, it triggers, blinking Undercover Operative. Choose to have Undercover Operative enter the battlefield as a copy of Felidar Guardian.
4
Repeat from step 2.

   Results

What do I get from this combo?
Infinite LTB
Infinite ETB
Aang, at the Crossroads
15%inclusion686 decks4.50K decks
Brago, King Eternal
0.2%inclusion24 decks12.8K decks
Abdel Adrian, Gorion's Ward // Candlekeep Sage
0.5%inclusion20 decks4.39K decks
Yorion, Sky Nomad
0.7%inclusion17 decks2.46K decks
Lagrella, the Magpie
0.6%inclusion12 decks1.88K decks
Reaper King
0.1%inclusion9 decks8.15K decks
Aminatou, the Fateshifter
0.1%inclusion9 decks6.57K decks
Sharuum the Hegemon
0.3%inclusion9 decks2.88K decks
The Wandering Minstrel
0.1%inclusion9 decks14.5K decks
Hashaton, Scarab's Fist
0.0%inclusion8 decks22K decks
Helga, Skittish Seer
0.0%inclusion7 decks16.6K decks
Jodah, Archmage Eternal
0.1%inclusion7 decks8.65K decks
Sefris of the Hidden Ways
0.1%inclusion6 decks11K decks
Bane, Lord of Darkness
0.3%inclusion6 decks2.34K decks
Niko, Light of Hope
0.1%inclusion5 decks8.42K decks
Livio, Oathsworn Sentinel // Sakashima of a Thousand Faces
10%inclusion5 decks49 decks
Sakashima of a Thousand Faces // Yoshimaru, Ever Faithful
1.0%inclusion5 decks512 decks
Zinnia, Valley's Voice
0.0%inclusion4 decks16.6K decks
New Cards
Bloodline Bidding
13%inclusion1 decks8 decks
10%synergy
Sodden Verdure
4.1%inclusion15 decks370 decks
-4%synergy
Personify
3.5%inclusion14 decks398 decks
2%synergy
Formidable Speaker
3.1%inclusion22 decks715 decks
0%synergy
Omni-Changeling
2.8%inclusion11 decks394 decks
1%synergy
High Synergy Cards
Restoration Angel
88%inclusion823 decks940 decks
85%synergy
Chameleon, Master of Disguise
84%inclusion658 decks788 decks
81%synergy
Starfield Vocalist
82%inclusion662 decks803 decks
80%synergy
Clever Impersonator
80%inclusion753 decks940 decks
78%synergy
Katara, the Fearless
80%inclusion584 decks726 decks
77%synergy
Evil Twin
76%inclusion83 decks109 decks
75%synergy
Waxen Shapethief
74%inclusion651 decks874 decks
74%synergy
Naga Fleshcrafter
74%inclusion627 decks847 decks
73%synergy
Vizier of Many Faces
73%inclusion688 decks940 decks
72%synergy
Altered Ego
74%inclusion562 decks763 decks
72%synergy
Top Cards
Phyrexian Metamorph
78%inclusion736 decks940 decks
71%synergy
Stunt Double
71%inclusion669 decks940 decks
70%synergy
Clone
71%inclusion666 decks940 decks
70%synergy
Spark Double
69%inclusion650 decks940 decks
63%synergy
Copycrook
68%inclusion626 decks925 decks
67%synergy
Mirrorhall Mimic
67%inclusion631 decks940 decks
66%synergy
Phantasmal Image
66%inclusion622 decks940 decks
64%synergy
Icewind Stalwart
63%inclusion596 decks940 decks
63%synergy
Dack's Duplicate
63%inclusion39 decks62 decks
62%synergy
Visage Bandit
61%inclusion571 decks937 decks
61%synergy
Game Changers
Ancient Tomb
29%inclusion275 decks940 decks
20%synergy
Chrome Mox
26%inclusion242 decks940 decks
20%synergy
Gaea's Cradle
25%inclusion188 decks763 decks
19%synergy
Worldly Tutor
24%inclusion186 decks763 decks
12%synergy
Mana Vault
23%inclusion215 decks940 decks
17%synergy
Mox Diamond
21%inclusion195 decks940 decks
16%synergy
Crop Rotation
21%inclusion157 decks763 decks
11%synergy
Force of Will
19%inclusion182 decks940 decks
10%synergy
Lion's Eye Diamond
14%inclusion135 decks940 decks
12%synergy
Grim Monolith
13%inclusion118 decks940 decks
11%synergy
Creatures
Mirror Image
61%inclusion569 decks940 decks
60%synergy
Sakashima the Impostor
60%inclusion562 decks940 decks
58%synergy
Sakashima of a Thousand Faces
59%inclusion556 decks940 decks
56%synergy
Birds of Paradise
59%inclusion449 decks763 decks
31%synergy
Callidus Assassin
59%inclusion64 decks109 decks
58%synergy
Flesh Duplicate
58%inclusion547 decks940 decks
57%synergy
Glasspool Mimic
57%inclusion533 decks940 decks
54%synergy
Gigantoplasm
54%inclusion508 decks940 decks
54%synergy
Avacyn's Pilgrim
54%inclusion409 decks763 decks
41%synergy
Preston, the Vanisher
53%inclusion502 decks940 decks
53%synergy
Noble Hierarch
51%inclusion386 decks763 decks
35%synergy
Delighted Halfling
50%inclusion379 decks763 decks
38%synergy
Eternal Witness
50%inclusion379 decks763 decks
33%synergy
Emiel the Blessed
48%inclusion370 decks763 decks
46%synergy
Metamorphosis Fanatic
47%inclusion42 decks89 decks
46%synergy
Roaming Throne
47%inclusion442 decks940 decks
41%synergy
Llanowar Elves
46%inclusion351 decks763 decks
26%synergy
Jwari Shapeshifter
44%inclusion418 decks940 decks
44%synergy
Soulherder
44%inclusion409 decks940 decks
39%synergy
Superior Spider-Man
41%inclusion19 decks46 decks
40%synergy
Colossal Grave-Reaver
40%inclusion12 decks30 decks
35%synergy
Sister Hospitaller
39%inclusion43 decks109 decks
38%synergy
Elvish Mystic
39%inclusion299 decks763 decks
23%synergy
Kroxa and Kunoros
38%inclusion17 decks45 decks
37%synergy
Wall of Stolen Identity
37%inclusion347 decks940 decks
36%synergy
Sakashima's Student
36%inclusion342 decks940 decks
35%synergy
Elvish Spirit Guide
36%inclusion274 decks763 decks
32%synergy
Ardyn, the Usurper
34%inclusion21 decks61 decks
33%synergy
Charming Prince
32%inclusion298 decks940 decks
30%synergy
Gyruda, Doom of Depths
30%inclusion33 decks109 decks
29%synergy
Badgermole Cub
29%inclusion206 decks713 decks
24%synergy
Mardu Siegebreaker
27%inclusion9 decks33 decks
22%synergy
Faeburrow Elder
26%inclusion199 decks763 decks
14%synergy
Thassa, Deep-Dwelling
26%inclusion245 decks940 decks
24%synergy
Bloom Tender
26%inclusion198 decks763 decks
18%synergy
Flickerwisp
25%inclusion236 decks940 decks
23%synergy
Baleful Strix
25%inclusion27 decks109 decks
12%synergy
Fyndhorn Elves
24%inclusion186 decks763 decks
15%synergy
Jackdaw Savior
22%inclusion203 decks914 decks
21%synergy
Ratadrabik of Urborg
22%inclusion24 decks109 decks
20%synergy
Supportive Parents
22%inclusion158 decks723 decks
22%synergy
Cloud of Faeries
21%inclusion197 decks940 decks
19%synergy
Coiling Oracle
20%inclusion155 decks763 decks
15%synergy
White Plume Adventurer
19%inclusion181 decks940 decks
18%synergy
Esper Sentinel
19%inclusion179 decks940 decks
0%synergy
Voice of Victory
19%inclusion161 decks851 decks
12%synergy
Aang, Swift Savior
19%inclusion143 decks756 decks
15%synergy
Phelia, Exuberant Shepherd
19%inclusion175 decks928 decks
17%synergy
Displacer Kitten
19%inclusion176 decks940 decks
14%synergy
Grand Abolisher
19%inclusion175 decks940 decks
10%synergy
Instants
Ephemerate
59%inclusion551 decks940 decks
53%synergy
Cloudshift
51%inclusion482 decks940 decks
48%synergy
Essence Flux
47%inclusion439 decks940 decks
44%synergy
Swords to Plowshares
42%inclusion396 decks940 decks
-19%synergy
An Offer You Can't Refuse
29%inclusion273 decks940 decks
4%synergy
Momentary Blink
28%inclusion267 decks940 decks
26%synergy
Path to Exile
28%inclusion260 decks940 decks
-20%synergy
Chord of Calling
23%inclusion175 decks763 decks
18%synergy
Ghostly Flicker
23%inclusion214 decks940 decks
18%synergy
Counterspell
23%inclusion213 decks940 decks
-19%synergy
Swan Song
21%inclusion194 decks940 decks
3%synergy
Silence
20%inclusion190 decks940 decks
14%synergy
Enlightened Tutor
19%inclusion179 decks940 decks
4%synergy
Cabal Ritual
18%inclusion20 decks109 decks
13%synergy
Fierce Guardianship
18%inclusion168 decks940 decks
0%synergy
Eerie Interlude
16%inclusion153 decks940 decks
13%synergy
Pact of Negation
16%inclusion153 decks940 decks
10%synergy
Mindbreak Trap
13%inclusion124 decks940 decks
8%synergy
Drown in the Loch
13%inclusion14 decks109 decks
8%synergy
Dovin's Veto
12%inclusion114 decks940 decks
-6%synergy
Flusterstorm
12%inclusion111 decks940 decks
5%synergy
Arcane Denial
11%inclusion105 decks940 decks
-9%synergy
Negate
11%inclusion104 decks940 decks
-10%synergy
Parting Gust
11%inclusion101 decks915 decks
9%synergy
Fell the Profane
11%inclusion11 decks100 decks
2%synergy
Heroic Intervention
11%inclusion83 decks763 decks
-20%synergy
Force of Negation
11%inclusion99 decks940 decks
2%synergy
Tainted Pact
10%inclusion11 decks109 decks
6%synergy
Despark
10%inclusion11 decks109 decks
-3%synergy
Eladamri's Call
10%inclusion73 decks763 decks
1%synergy
Cyclonic Rift
9.5%inclusion89 decks940 decks
-12%synergy
Beast Within
9.3%inclusion71 decks763 decks
-24%synergy
Flicker of Fate
9.3%inclusion87 decks940 decks
8%synergy
Utter End
9.2%inclusion10 decks109 decks
4%synergy
Lae'zel's Acrobatics
8.8%inclusion83 decks940 decks
7%synergy
Mental Misstep
8.8%inclusion83 decks940 decks
3%synergy
Snap
8.6%inclusion81 decks940 decks
1%synergy
Generous Gift
8.0%inclusion75 decks940 decks
-14%synergy
Hide on the Ceiling
7.6%inclusion60 decks787 decks
6%synergy
Into the Flood Maw
7.4%inclusion68 decks915 decks
4%synergy
Sink into Stupor
7.4%inclusion68 decks925 decks
-3%synergy
Lim-Dûl's Vault
7.3%inclusion8 decks109 decks
4%synergy
Brainstorm
7.0%inclusion66 decks940 decks
-11%synergy
Planar Incision
6.8%inclusion64 decks940 decks
5%synergy
Semester's End
6.6%inclusion62 decks940 decks
5%synergy
Dispel
6.6%inclusion62 decks940 decks
3%synergy
Mana Drain
6.5%inclusion61 decks940 decks
-8%synergy
Desperate Ritual
6.5%inclusion4 decks62 decks
4%synergy
Pyretic Ritual
6.5%inclusion4 decks62 decks
3%synergy
Deflecting Swat
6.5%inclusion4 decks62 decks
-10%synergy
Sorceries
Dread Return
48%inclusion52 decks109 decks
43%synergy
Farseek
28%inclusion214 decks763 decks
-8%synergy
Demonic Tutor
26%inclusion28 decks109 decks
7%synergy
Nature's Lore
23%inclusion174 decks763 decks
-9%synergy
Finale of Devastation
22%inclusion168 decks763 decks
15%synergy
Rampant Growth
19%inclusion148 decks763 decks
-14%synergy
Eldritch Evolution
18%inclusion136 decks763 decks
14%synergy
Nature's Rhythm
17%inclusion126 decks740 decks
13%synergy
Three Visits
17%inclusion126 decks763 decks
-8%synergy
Culling Ritual
16%inclusion7 decks43 decks
6%synergy
Avatar's Wrath
16%inclusion121 decks756 decks
12%synergy
Cultivate
15%inclusion115 decks763 decks
-27%synergy
Kodama's Reach
13%inclusion98 decks763 decks
-14%synergy
Green Sun's Zenith
13%inclusion97 decks763 decks
8%synergy
Damn
12%inclusion13 decks109 decks
-3%synergy
Shared Roots
10%inclusion73 decks705 decks
6%synergy
Persist
10%inclusion11 decks109 decks
8%synergy
Splash Portal
7.8%inclusion71 decks914 decks
7%synergy
Diabolic Tutor
6.4%inclusion7 decks109 decks
1%synergy
Diabolic Intent
6.4%inclusion7 decks109 decks
-1%synergy
Neoform
6.2%inclusion47 decks763 decks
3%synergy
Singularity Rupture
5.7%inclusion3 decks53 decks
2%synergy
Stitch Together
5.5%inclusion6 decks109 decks
4%synergy
Buried Alive
5.5%inclusion6 decks109 decks
-1%synergy
Utility Artifacts
Panharmonicon
51%inclusion483 decks940 decks
47%synergy
Mirror Box
14%inclusion133 decks940 decks
13%synergy
Conjurer's Closet
13%inclusion126 decks940 decks
11%synergy
Wishclaw Talisman
10%inclusion11 decks109 decks
5%synergy
Altar of the Brood
6.4%inclusion60 decks940 decks
5%synergy
The One Ring
5.7%inclusion54 decks940 decks
-3%synergy
Swiftfoot Boots
5.5%inclusion52 decks940 decks
-22%synergy
Enchantments
Wild Growth
36%inclusion275 decks763 decks
26%synergy
Airbender Ascension
29%inclusion223 decks761 decks
26%synergy
Animate Dead
26%inclusion28 decks109 decks
17%synergy
Food Chain
24%inclusion184 decks763 decks
22%synergy
Utopia Sprawl
22%inclusion165 decks763 decks
14%synergy
Mystic Remora
21%inclusion197 decks940 decks
5%synergy
Heartless Summoning
20%inclusion22 decks109 decks
19%synergy
Touch the Spirit Realm
18%inclusion169 decks940 decks
16%synergy
Rhystic Study
18%inclusion169 decks940 decks
-5%synergy
Teleportation Circle
16%inclusion151 decks940 decks
13%synergy
Smothering Tithe
15%inclusion138 decks940 decks
-6%synergy
Elemental Bond
13%inclusion100 decks763 decks
8%synergy
Dance of the Dead
13%inclusion14 decks109 decks
11%synergy
Sneak Attack
11%inclusion7 decks62 decks
9%synergy
Deafening Silence
10%inclusion95 decks940 decks
8%synergy
Annie Joins Up
10%inclusion4 decks41 decks
-3%synergy
Impact Tremors
10%inclusion6 decks62 decks
0%synergy
Virtue of Knowledge
9.4%inclusion88 decks940 decks
8%synergy
Carpet of Flowers
9.3%inclusion71 decks763 decks
6%synergy
Cream of the Crop
7.9%inclusion60 decks763 decks
7%synergy
Birthing Ritual
7.5%inclusion57 decks758 decks
7%synergy
Mirror March
6.5%inclusion4 decks62 decks
6%synergy
Molten Echoes
6.5%inclusion4 decks62 decks
5%synergy
Underworld Breach
6.5%inclusion4 decks62 decks
0%synergy
Mortuary
6.4%inclusion7 decks109 decks
6%synergy
Sylvan Library
5.9%inclusion45 decks763 decks
-3%synergy
Planeswalkers
Saheeli Rai
6.5%inclusion4 decks62 decks
6%synergy
Utility Lands
Boseiju, Who Endures
35%inclusion270 decks763 decks
17%synergy
Otawara, Soaring City
29%inclusion273 decks940 decks
13%synergy
Reliquary Tower
15%inclusion141 decks940 decks
-15%synergy
City of Traitors
14%inclusion128 decks940 decks
12%synergy
Yavimaya, Cradle of Growth
13%inclusion118 decks940 decks
4%synergy
Takenuma, Abandoned Mire
11%inclusion12 decks109 decks
2%synergy
Bojuka Bog
11%inclusion12 decks109 decks
-19%synergy
Crystal Vein
10%inclusion91 decks940 decks
9%synergy
Mistrise Village
10%inclusion82 decks849 decks
2%synergy
Cephalid Coliseum
8.1%inclusion76 decks940 decks
5%synergy
Peat Bog
7.3%inclusion8 decks109 decks
7%synergy
Witch's Cottage
7.3%inclusion8 decks109 decks
4%synergy
Alchemist's Refuge
6.4%inclusion49 decks763 decks
0%synergy
Urza's Saga
6.1%inclusion57 decks940 decks
-1%synergy
Dryad Arbor
5.8%inclusion44 decks763 decks
2%synergy
Mortuary Mire
5.5%inclusion6 decks109 decks
1%synergy
Phyrexian Tower
5.5%inclusion6 decks109 decks
-3%synergy
Shifting Woodland
5.4%inclusion41 decks758 decks
-1%synergy
Abandoned Air Temple
5.2%inclusion39 decks744 decks
0%synergy
Great Hall of the Citadel
5.1%inclusion48 decks940 decks
4%synergy
Mana Artifacts
Sol Ring
81%inclusion759 decks940 decks
-3%synergy
Arcane Signet
78%inclusion733 decks940 decks
6%synergy
Talisman of Dominance
53%inclusion58 decks109 decks
21%synergy
Talisman of Hierarchy
41%inclusion45 decks109 decks
15%synergy
Fellwar Stone
36%inclusion341 decks940 decks
16%synergy
Dimir Signet
30%inclusion33 decks109 decks
6%synergy
Orzhov Signet
29%inclusion32 decks109 decks
6%synergy
Lotus Petal
29%inclusion274 decks940 decks
22%synergy
Talisman of Progress
29%inclusion272 decks940 decks
4%synergy
Talisman of Curiosity
27%inclusion205 decks763 decks
14%synergy
Talisman of Creativity
26%inclusion16 decks62 decks
-2%synergy
Talisman of Unity
20%inclusion156 decks763 decks
13%synergy
Talisman of Indulgence
18%inclusion8 decks45 decks
-10%synergy
Izzet Signet
18%inclusion11 decks62 decks
-6%synergy
Talisman of Resilience
16%inclusion7 decks43 decks
4%synergy
Relic of Legends
15%inclusion138 decks940 decks
12%synergy
Talisman of Conviction
15%inclusion9 decks62 decks
-10%synergy
Azorius Signet
14%inclusion135 decks940 decks
-7%synergy
Boros Signet
11%inclusion7 decks62 decks
-8%synergy
Cursed Mirror
8.1%inclusion5 decks62 decks
2%synergy
Mind Stone
7.4%inclusion70 decks940 decks
-7%synergy
Pentad Prism
7.3%inclusion69 decks940 decks
7%synergy
Thought Vessel
7.2%inclusion68 decks940 decks
-10%synergy
Relic of Sauron
6.7%inclusion3 decks45 decks
-1%synergy
Charcoal Diamond
5.5%inclusion6 decks109 decks
1%synergy
Simic Signet
5.5%inclusion42 decks763 decks
-5%synergy
Bender's Waterskin
5.2%inclusion41 decks792 decks
2%synergy
Lands
Command Tower
93%inclusion874 decks940 decks
19%synergy
Breeding Pool
61%inclusion462 decks763 decks
19%synergy
Temple Garden
56%inclusion431 decks763 decks
17%synergy
Exotic Orchard
56%inclusion526 decks940 decks
19%synergy
Hallowed Fountain
53%inclusion496 decks940 decks
13%synergy
Flooded Strand
51%inclusion478 decks940 decks
39%synergy
Windswept Heath
47%inclusion438 decks940 decks
36%synergy
Misty Rainforest
46%inclusion435 decks940 decks
35%synergy
Watery Grave
45%inclusion49 decks109 decks
3%synergy
Godless Shrine
39%inclusion43 decks109 decks
-2%synergy
Tropical Island
38%inclusion287 decks763 decks
23%synergy
Overgrown Tomb
37%inclusion16 decks43 decks
-4%synergy
Savannah
36%inclusion277 decks763 decks
24%synergy
Yavimaya Coast
36%inclusion274 decks763 decks
9%synergy
Hinterland Harbor
34%inclusion263 decks763 decks
1%synergy
Glacial Fortress
34%inclusion323 decks940 decks
1%synergy
Raffine's Tower
33%inclusion36 decks109 decks
9%synergy
Polluted Delta
33%inclusion308 decks940 decks
21%synergy
Tundra
32%inclusion304 decks940 decks
18%synergy
City of Brass
32%inclusion300 decks940 decks
24%synergy
Badlands
31%inclusion14 decks45 decks
18%synergy
Adarkar Wastes
31%inclusion292 decks940 decks
7%synergy
Prairie Stream
31%inclusion291 decks940 decks
-2%synergy
Rejuvenating Springs
31%inclusion235 decks763 decks
5%synergy
Bayou
30%inclusion13 decks43 decks
17%synergy
Brushland
30%inclusion229 decks763 decks
10%synergy
Mana Confluence
30%inclusion282 decks940 decks
23%synergy
Scalding Tarn
30%inclusion282 decks940 decks
19%synergy
Wooded Foothills
30%inclusion281 decks940 decks
19%synergy
Cavern of Souls
29%inclusion270 decks940 decks
21%synergy
Verdant Catacombs
29%inclusion270 decks940 decks
18%synergy
Sea of Clouds
28%inclusion263 decks940 decks
4%synergy
Zagoth Triome
28%inclusion12 decks43 decks
1%synergy
Canopy Vista
28%inclusion212 decks763 decks
-8%synergy
Gemstone Caverns
28%inclusion261 decks940 decks
23%synergy
Arcane Sanctum
28%inclusion30 decks109 decks
0%synergy
Volcanic Island
27%inclusion17 decks62 decks
13%synergy
Steam Vents
27%inclusion17 decks62 decks
-11%synergy
Spara's Headquarters
27%inclusion205 decks763 decks
0%synergy
Sunpetal Grove
27%inclusion205 decks763 decks
-1%synergy
Undercity Sewers
27%inclusion29 decks109 decks
15%synergy
Marsh Flats
27%inclusion250 decks940 decks
16%synergy
Sunken Hollow
26%inclusion28 decks109 decks
-8%synergy
Underground Sea
25%inclusion27 decks109 decks
10%synergy
Dreamroot Cascade
24%inclusion185 decks763 decks
3%synergy
Bountiful Promenade
24%inclusion183 decks763 decks
2%synergy
Shadowy Backstreet
23%inclusion25 decks109 decks
13%synergy
Arid Mesa
22%inclusion210 decks940 decks
12%synergy
Taiga
22%inclusion9 decks41 decks
9%synergy
Scrubland
21%inclusion23 decks109 decks
8%synergy