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
16%inclusion722 decks4.63K decks
Brago, King Eternal
0.2%inclusion23 decks13K decks
Abdel Adrian, Gorion's Ward // Candlekeep Sage
0.5%inclusion20 decks4.41K decks
Yorion, Sky Nomad
0.7%inclusion17 decks2.50K decks
Lagrella, the Magpie
0.6%inclusion12 decks1.91K decks
Reaper King
0.1%inclusion9 decks8.24K decks
Sharuum the Hegemon
0.3%inclusion9 decks2.91K decks
The Wandering Minstrel
0.1%inclusion9 decks14.8K decks
Aminatou, the Fateshifter
0.1%inclusion8 decks6.60K decks
Hashaton, Scarab's Fist
0.0%inclusion8 decks22.3K decks
Helga, Skittish Seer
0.0%inclusion7 decks17K decks
Jodah, Archmage Eternal
0.1%inclusion7 decks8.73K decks
Niko, Light of Hope
0.1%inclusion6 decks8.53K decks
Roon of the Hidden Realm
0.2%inclusion6 decks3.29K decks
Sefris of the Hidden Ways
0.1%inclusion6 decks11.2K decks
Bane, Lord of Darkness
0.3%inclusion6 decks2.36K decks
Livio, Oathsworn Sentinel // Sakashima of a Thousand Faces
10%inclusion5 decks49 decks
Sakashima of a Thousand Faces // Yoshimaru, Ever Faithful
1.0%inclusion5 decks518 decks
New Cards
Continue?
2.3%inclusion7 decks307 decks
0%synergy
Don & Leo, Problem Solvers
0.8%inclusion3 decks394 decks
0%synergy
Frog Butler
0.3%inclusion1 decks289 decks
0%synergy
Irma, Part-Time Mutant
0.3%inclusion1 decks307 decks
-2%synergy
Transdimensional Bovine
0.3%inclusion1 decks369 decks
0%synergy
High Synergy Cards
Restoration Angel
88%inclusion861 decks977 decks
86%synergy
Chameleon, Master of Disguise
84%inclusion695 decks828 decks
81%synergy
Starfield Vocalist
83%inclusion698 decks843 decks
80%synergy
Clever Impersonator
80%inclusion786 decks977 decks
78%synergy
Katara, the Fearless
80%inclusion614 decks764 decks
77%synergy
Evil Twin
77%inclusion82 decks106 decks
76%synergy
Waxen Shapethief
75%inclusion684 decks914 decks
74%synergy
Naga Fleshcrafter
74%inclusion658 decks887 decks
73%synergy
Vizier of Many Faces
74%inclusion719 decks977 decks
73%synergy
Altered Ego
74%inclusion592 decks800 decks
73%synergy
Top Cards
Phyrexian Metamorph
79%inclusion768 decks977 decks
71%synergy
Clone
72%inclusion700 decks977 decks
71%synergy
Stunt Double
72%inclusion700 decks977 decks
71%synergy
Spark Double
69%inclusion675 decks977 decks
63%synergy
Copycrook
68%inclusion656 decks965 decks
68%synergy
Mirrorhall Mimic
68%inclusion662 decks977 decks
67%synergy
Phantasmal Image
67%inclusion653 decks977 decks
64%synergy
Icewind Stalwart
65%inclusion632 decks977 decks
64%synergy
Dack's Duplicate
63%inclusion39 decks62 decks
62%synergy
Visage Bandit
62%inclusion603 decks977 decks
61%synergy
Game Changers
Ancient Tomb
30%inclusion289 decks977 decks
20%synergy
Chrome Mox
27%inclusion259 decks977 decks
21%synergy
Gaea's Cradle
24%inclusion195 decks800 decks
18%synergy
Worldly Tutor
24%inclusion194 decks800 decks
12%synergy
Mana Vault
24%inclusion231 decks977 decks
18%synergy
Mox Diamond
21%inclusion209 decks977 decks
17%synergy
Crop Rotation
21%inclusion169 decks800 decks
11%synergy
Force of Will
19%inclusion183 decks977 decks
9%synergy
Lion's Eye Diamond
15%inclusion145 decks977 decks
13%synergy
Grim Monolith
13%inclusion127 decks977 decks
11%synergy
Creatures
Mirror Image
62%inclusion601 decks977 decks
61%synergy
Callidus Assassin
60%inclusion64 decks106 decks
59%synergy
Sakashima the Impostor
60%inclusion585 decks977 decks
58%synergy
Sakashima of a Thousand Faces
60%inclusion582 decks977 decks
57%synergy
Flesh Duplicate
59%inclusion572 decks977 decks
57%synergy
Birds of Paradise
59%inclusion468 decks800 decks
31%synergy
Glasspool Mimic
57%inclusion555 decks977 decks
54%synergy
Gigantoplasm
54%inclusion531 decks977 decks
54%synergy
Avacyn's Pilgrim
54%inclusion432 decks800 decks
42%synergy
Preston, the Vanisher
54%inclusion525 decks977 decks
53%synergy
Delighted Halfling
50%inclusion398 decks800 decks
38%synergy
Noble Hierarch
50%inclusion396 decks800 decks
34%synergy
Eternal Witness
49%inclusion393 decks800 decks
33%synergy
Emiel the Blessed
48%inclusion384 decks800 decks
45%synergy
Metamorphosis Fanatic
48%inclusion42 decks88 decks
47%synergy
Roaming Throne
48%inclusion466 decks977 decks
41%synergy
Llanowar Elves
46%inclusion369 decks800 decks
26%synergy
Jwari Shapeshifter
45%inclusion439 decks977 decks
45%synergy
Soulherder
44%inclusion430 decks977 decks
40%synergy
Superior Spider-Man
42%inclusion19 decks45 decks
41%synergy
Sister Hospitaller
41%inclusion43 decks106 decks
40%synergy
Colossal Grave-Reaver
40%inclusion12 decks30 decks
35%synergy
Elvish Mystic
39%inclusion313 decks800 decks
23%synergy
Kroxa and Kunoros
38%inclusion17 decks45 decks
37%synergy
Elvish Spirit Guide
38%inclusion300 decks800 decks
34%synergy
Wall of Stolen Identity
37%inclusion360 decks977 decks
36%synergy
Sakashima's Student
37%inclusion357 decks977 decks
36%synergy
Ardyn, the Usurper
35%inclusion21 decks60 decks
34%synergy
Charming Prince
32%inclusion310 decks977 decks
30%synergy
Gyruda, Doom of Depths
31%inclusion33 decks106 decks
30%synergy
Badgermole Cub
28%inclusion213 decks752 decks
24%synergy
Mardu Siegebreaker
27%inclusion9 decks33 decks
22%synergy
Faeburrow Elder
27%inclusion213 decks800 decks
15%synergy
Thassa, Deep-Dwelling
27%inclusion260 decks977 decks
24%synergy
Flickerwisp
26%inclusion252 decks977 decks
24%synergy
Bloom Tender
26%inclusion205 decks800 decks
18%synergy
Fyndhorn Elves
25%inclusion200 decks800 decks
15%synergy
Baleful Strix
24%inclusion25 decks106 decks
10%synergy
Jackdaw Savior
23%inclusion217 decks954 decks
22%synergy
Ratadrabik of Urborg
23%inclusion24 decks106 decks
20%synergy
Supportive Parents
22%inclusion167 decks761 decks
22%synergy
Cloud of Faeries
21%inclusion209 decks977 decks
19%synergy
Coiling Oracle
20%inclusion161 decks800 decks
14%synergy
White Plume Adventurer
20%inclusion195 decks977 decks
19%synergy
Phelia, Exuberant Shepherd
20%inclusion190 decks968 decks
18%synergy
Voice of Victory
20%inclusion174 decks891 decks
13%synergy
Aang, Swift Savior
19%inclusion154 decks797 decks
15%synergy
Esper Sentinel
19%inclusion187 decks977 decks
0%synergy
Displacer Kitten
19%inclusion181 decks977 decks
13%synergy
Brenard, Ginger Sculptor
19%inclusion148 decks800 decks
18%synergy
Instants
Ephemerate
59%inclusion577 decks977 decks
53%synergy
Cloudshift
51%inclusion500 decks977 decks
47%synergy
Essence Flux
47%inclusion461 decks977 decks
44%synergy
Swords to Plowshares
42%inclusion407 decks977 decks
-19%synergy
An Offer You Can't Refuse
29%inclusion286 decks977 decks
4%synergy
Momentary Blink
28%inclusion276 decks977 decks
26%synergy
Path to Exile
28%inclusion269 decks977 decks
-20%synergy
Chord of Calling
23%inclusion181 decks800 decks
17%synergy
Counterspell
23%inclusion221 decks977 decks
-19%synergy
Ghostly Flicker
23%inclusion220 decks977 decks
18%synergy
Swan Song
20%inclusion198 decks977 decks
3%synergy
Enlightened Tutor
20%inclusion195 decks977 decks
5%synergy
Silence
20%inclusion194 decks977 decks
14%synergy
Cabal Ritual
19%inclusion20 decks106 decks
14%synergy
Fierce Guardianship
18%inclusion175 decks977 decks
0%synergy
Pact of Negation
16%inclusion156 decks977 decks
9%synergy
Eerie Interlude
16%inclusion155 decks977 decks
12%synergy
Drown in the Loch
13%inclusion14 decks106 decks
9%synergy
Mindbreak Trap
13%inclusion127 decks977 decks
8%synergy
Dovin's Veto
12%inclusion116 decks977 decks
-6%synergy
Flusterstorm
12%inclusion113 decks977 decks
4%synergy
Parting Gust
12%inclusion110 decks955 decks
9%synergy
Fell the Profane
11%inclusion11 decks99 decks
2%synergy
Heroic Intervention
11%inclusion86 decks800 decks
-20%synergy
Negate
11%inclusion105 decks977 decks
-10%synergy
Arcane Denial
11%inclusion104 decks977 decks
-10%synergy
Force of Negation
10%inclusion102 decks977 decks
2%synergy
Tainted Pact
10%inclusion11 decks106 decks
7%synergy
Eladamri's Call
10%inclusion76 decks800 decks
1%synergy
Flicker of Fate
9.4%inclusion92 decks977 decks
8%synergy
Cyclonic Rift
9.4%inclusion92 decks977 decks
-12%synergy
Beast Within
9.0%inclusion72 decks800 decks
-25%synergy
Mental Misstep
8.9%inclusion87 decks977 decks
3%synergy
Snap
8.9%inclusion87 decks977 decks
1%synergy
Lae'zel's Acrobatics
8.5%inclusion83 decks977 decks
7%synergy
Utter End
8.5%inclusion9 decks106 decks
4%synergy
Despark
8.5%inclusion9 decks106 decks
-5%synergy
Lim-Dûl's Vault
7.5%inclusion8 decks106 decks
5%synergy
Generous Gift
7.5%inclusion73 decks977 decks
-14%synergy
Sink into Stupor
7.4%inclusion71 decks965 decks
-3%synergy
Into the Flood Maw
7.3%inclusion70 decks955 decks
4%synergy
Hide on the Ceiling
7.3%inclusion60 decks827 decks
6%synergy
Brainstorm
7.2%inclusion70 decks977 decks
-11%synergy
Planar Incision
6.9%inclusion67 decks977 decks
5%synergy
Dispel
6.8%inclusion66 decks977 decks
3%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
Semester's End
6.3%inclusion62 decks977 decks
5%synergy
Displace
6.3%inclusion62 decks977 decks
5%synergy
Sorceries
Dread Return
49%inclusion52 decks106 decks
44%synergy
Farseek
28%inclusion223 decks800 decks
-8%synergy
Demonic Tutor
25%inclusion27 decks106 decks
6%synergy
Nature's Lore
23%inclusion180 decks800 decks
-9%synergy
Finale of Devastation
21%inclusion170 decks800 decks
14%synergy
Rampant Growth
19%inclusion154 decks800 decks
-14%synergy
Eldritch Evolution
18%inclusion141 decks800 decks
13%synergy
Nature's Rhythm
17%inclusion135 decks778 decks
13%synergy
Culling Ritual
17%inclusion7 decks42 decks
6%synergy
Avatar's Wrath
16%inclusion129 decks797 decks
12%synergy
Three Visits
16%inclusion129 decks800 decks
-8%synergy
Cultivate
15%inclusion118 decks800 decks
-28%synergy
Green Sun's Zenith
13%inclusion104 decks800 decks
8%synergy
Kodama's Reach
13%inclusion101 decks800 decks
-14%synergy
Damn
12%inclusion13 decks106 decks
-3%synergy
Persist
10%inclusion11 decks106 decks
8%synergy
Shared Roots
10%inclusion75 decks744 decks
5%synergy
Splash Portal
7.9%inclusion75 decks954 decks
7%synergy
Diabolic Tutor
6.6%inclusion7 decks106 decks
1%synergy
Diabolic Intent
6.6%inclusion7 decks106 decks
-1%synergy
Neoform
6.5%inclusion52 decks800 decks
3%synergy
Singularity Rupture
5.8%inclusion3 decks52 decks
2%synergy
Stitch Together
5.7%inclusion6 decks106 decks
4%synergy
Buried Alive
5.7%inclusion6 decks106 decks
0%synergy
Utility Artifacts
Panharmonicon
51%inclusion502 decks977 decks
47%synergy
Mirror Box
14%inclusion140 decks977 decks
13%synergy
Conjurer's Closet
13%inclusion131 decks977 decks
11%synergy
Wishclaw Talisman
10%inclusion11 decks106 decks
5%synergy
Altar of the Brood
6.4%inclusion63 decks977 decks
5%synergy
The One Ring
5.8%inclusion57 decks977 decks
-2%synergy
Swiftfoot Boots
5.5%inclusion54 decks977 decks
-22%synergy
Enchantments
Wild Growth
36%inclusion285 decks800 decks
26%synergy
Airbender Ascension
30%inclusion241 decks802 decks
27%synergy
Animate Dead
26%inclusion28 decks106 decks
18%synergy
Food Chain
24%inclusion193 decks800 decks
22%synergy
Utopia Sprawl
22%inclusion172 decks800 decks
14%synergy
Mystic Remora
21%inclusion203 decks977 decks
5%synergy
Heartless Summoning
21%inclusion22 decks106 decks
20%synergy
Touch the Spirit Realm
19%inclusion185 decks977 decks
17%synergy
Rhystic Study
18%inclusion175 decks977 decks
-5%synergy
Teleportation Circle
16%inclusion156 decks977 decks
13%synergy
Smothering Tithe
15%inclusion142 decks977 decks
-6%synergy
Elemental Bond
14%inclusion108 decks800 decks
8%synergy
Dance of the Dead
13%inclusion14 decks106 decks
12%synergy
Sneak Attack
11%inclusion7 decks62 decks
9%synergy
Deafening Silence
11%inclusion105 decks977 decks
9%synergy
Virtue of Knowledge
10%inclusion96 decks977 decks
8%synergy
Annie Joins Up
10%inclusion4 decks41 decks
-3%synergy
Carpet of Flowers
10%inclusion78 decks800 decks
7%synergy
Impact Tremors
10%inclusion6 decks62 decks
0%synergy
Cream of the Crop
8.5%inclusion68 decks800 decks
8%synergy
Birthing Ritual
8.3%inclusion66 decks796 decks
8%synergy
Mortuary
6.6%inclusion7 decks106 decks
6%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
Sylvan Library
5.5%inclusion44 decks800 decks
-3%synergy
Planeswalkers
Saheeli Rai
6.5%inclusion4 decks62 decks
6%synergy
Utility Lands
Boseiju, Who Endures
35%inclusion282 decks800 decks
17%synergy
Otawara, Soaring City
29%inclusion285 decks977 decks
13%synergy
Reliquary Tower
15%inclusion142 decks977 decks
-15%synergy
City of Traitors
14%inclusion139 decks977 decks
13%synergy
Yavimaya, Cradle of Growth
12%inclusion122 decks977 decks
4%synergy
Takenuma, Abandoned Mire
11%inclusion12 decks106 decks
3%synergy
Bojuka Bog
11%inclusion12 decks106 decks
-18%synergy
Crystal Vein
10%inclusion102 decks977 decks
9%synergy
Mistrise Village
9.3%inclusion83 decks889 decks
2%synergy
Cephalid Coliseum
8.9%inclusion87 decks977 decks
5%synergy
Peat Bog
7.5%inclusion8 decks106 decks
7%synergy
Witch's Cottage
7.5%inclusion8 decks106 decks
4%synergy
Alchemist's Refuge
6.6%inclusion53 decks800 decks
1%synergy
Urza's Saga
6.1%inclusion60 decks977 decks
-1%synergy
Dryad Arbor
5.9%inclusion47 decks800 decks
2%synergy
Phyrexian Tower
5.7%inclusion6 decks106 decks
-3%synergy
Shifting Woodland
5.5%inclusion44 decks796 decks
-1%synergy
Great Hall of the Citadel
5.5%inclusion54 decks977 decks
5%synergy
Abandoned Air Temple
5.4%inclusion42 decks785 decks
0%synergy
Mana Artifacts
Sol Ring
81%inclusion791 decks977 decks
-3%synergy
Arcane Signet
77%inclusion754 decks977 decks
5%synergy
Talisman of Dominance
53%inclusion56 decks106 decks
21%synergy
Talisman of Hierarchy
41%inclusion43 decks106 decks
14%synergy
Fellwar Stone
37%inclusion357 decks977 decks
16%synergy
Orzhov Signet
30%inclusion32 decks106 decks
7%synergy
Dimir Signet
30%inclusion32 decks106 decks
6%synergy
Lotus Petal
30%inclusion291 decks977 decks
23%synergy
Talisman of Progress
29%inclusion279 decks977 decks
3%synergy
Talisman of Curiosity
27%inclusion218 decks800 decks
15%synergy
Talisman of Creativity
26%inclusion16 decks62 decks
-2%synergy
Talisman of Unity
21%inclusion164 decks800 decks
13%synergy
Talisman of Indulgence
18%inclusion8 decks45 decks
-10%synergy
Izzet Signet
18%inclusion11 decks62 decks
-6%synergy
Talisman of Resilience
17%inclusion7 decks42 decks
4%synergy
Relic of Legends
15%inclusion149 decks977 decks
13%synergy
Talisman of Conviction
15%inclusion9 decks62 decks
-10%synergy
Azorius Signet
14%inclusion136 decks977 decks
-7%synergy
Boros Signet
11%inclusion7 decks62 decks
-8%synergy
Cursed Mirror
8.1%inclusion5 decks62 decks
2%synergy
Pentad Prism
8.0%inclusion78 decks977 decks
8%synergy
Mind Stone
7.1%inclusion69 decks977 decks
-7%synergy
Thought Vessel
7.1%inclusion69 decks977 decks
-10%synergy
Relic of Sauron
6.7%inclusion3 decks45 decks
-1%synergy
Charcoal Diamond
5.7%inclusion6 decks106 decks
2%synergy
Simic Signet
5.5%inclusion44 decks800 decks
-5%synergy
Bender's Waterskin
5.3%inclusion44 decks832 decks
2%synergy
Mox Amber
5.1%inclusion50 decks977 decks
1%synergy
Lands
Command Tower
93%inclusion906 decks977 decks
19%synergy
Breeding Pool
60%inclusion480 decks800 decks
18%synergy
Temple Garden
56%inclusion448 decks800 decks
17%synergy
Exotic Orchard
55%inclusion540 decks977 decks
19%synergy
Hallowed Fountain
52%inclusion512 decks977 decks
12%synergy
Flooded Strand
51%inclusion500 decks977 decks
40%synergy
Windswept Heath
47%inclusion457 decks977 decks
36%synergy
Misty Rainforest
46%inclusion453 decks977 decks
35%synergy
Watery Grave
44%inclusion47 decks106 decks
3%synergy
Godless Shrine
40%inclusion42 decks106 decks
-2%synergy
Tropical Island
38%inclusion303 decks800 decks
24%synergy
Yavimaya Coast
37%inclusion293 decks800 decks
10%synergy
Savannah
37%inclusion292 decks800 decks
24%synergy
Overgrown Tomb
36%inclusion15 decks42 decks
-6%synergy
Hinterland Harbor
35%inclusion279 decks800 decks
1%synergy
Glacial Fortress
34%inclusion336 decks977 decks
1%synergy
Tundra
33%inclusion320 decks977 decks
19%synergy
City of Brass
33%inclusion318 decks977 decks
25%synergy
Polluted Delta
33%inclusion318 decks977 decks
20%synergy
Raffine's Tower
32%inclusion34 decks106 decks
8%synergy
Adarkar Wastes
32%inclusion310 decks977 decks
8%synergy
Prairie Stream
31%inclusion305 decks977 decks
-2%synergy
Badlands
31%inclusion14 decks45 decks
18%synergy
Bayou
31%inclusion13 decks42 decks
18%synergy
Brushland
31%inclusion246 decks800 decks
11%synergy
Wooded Foothills
30%inclusion296 decks977 decks
19%synergy
Mana Confluence
30%inclusion295 decks977 decks
23%synergy
Rejuvenating Springs
30%inclusion240 decks800 decks
4%synergy
Scalding Tarn
30%inclusion293 decks977 decks
19%synergy
Cavern of Souls
29%inclusion282 decks977 decks
22%synergy
Gemstone Caverns
28%inclusion277 decks977 decks
23%synergy
Verdant Catacombs
28%inclusion277 decks977 decks
17%synergy
Canopy Vista
28%inclusion225 decks800 decks
-8%synergy
Volcanic Island
27%inclusion17 decks62 decks
13%synergy
Steam Vents
27%inclusion17 decks62 decks
-11%synergy
Sea of Clouds
27%inclusion265 decks977 decks
3%synergy
Sunpetal Grove
27%inclusion216 decks800 decks
-1%synergy
Marsh Flats
27%inclusion260 decks977 decks
16%synergy
Undercity Sewers
26%inclusion28 decks106 decks
15%synergy
Arcane Sanctum
26%inclusion28 decks106 decks
-1%synergy
Spara's Headquarters
26%inclusion211 decks800 decks
-1%synergy
Zagoth Triome
26%inclusion11 decks42 decks
-1%synergy
Underground Sea
25%inclusion27 decks106 decks
11%synergy
Sunken Hollow
25%inclusion26 decks106 decks
-9%synergy
Dreamroot Cascade
24%inclusion195 decks800 decks
3%synergy
Bountiful Promenade
24%inclusion188 decks800 decks
2%synergy
Arid Mesa
23%inclusion222 decks977 decks
13%synergy
Shadowy Backstreet
23%inclusion24 decks106 decks
12%synergy
Taiga
22%inclusion9 decks41 decks
9%synergy
Scrubland
22%inclusion23 decks106 decks
8%synergy