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
12%inclusion337 decks2.71K decks
Top Commanders
Brago, King Eternal
0.2%inclusion23 decks12K decks
Abdel Adrian, Gorion's Ward // Candlekeep Sage
0.4%inclusion18 decks4.30K decks
Yorion, Sky Nomad
0.7%inclusion16 decks2.39K decks
Lagrella, the Magpie
0.8%inclusion14 decks1.83K decks
Aminatou, the Fateshifter
0.2%inclusion12 decks6.67K decks
Sharuum the Hegemon
0.4%inclusion12 decks2.79K decks
The Wandering Minstrel
0.1%inclusion8 decks11.6K decks
Jodah, Archmage Eternal
0.1%inclusion8 decks8.51K decks
Reaper King
0.1%inclusion8 decks7.29K decks
Helga, Skittish Seer
0.0%inclusion7 decks14.4K decks
Bane, Lord of Darkness
0.3%inclusion6 decks2.31K decks
Hashaton, Scarab's Fist
0.0%inclusion6 decks19.5K decks
Livio, Oathsworn Sentinel // Sakashima of a Thousand Faces
10%inclusion5 decks49 decks
Zinnia, Valley's Voice
0.0%inclusion5 decks14.9K decks
Sefris of the Hidden Ways
0.0%inclusion5 decks10.3K decks
Niko, Light of Hope
0.1%inclusion4 decks7.37K decks
Roon of the Hidden Realm
0.1%inclusion4 decks3.16K decks
New Cards
Katara, the Fearless
75%inclusion275 decks369 decks
71%synergy
Airbender Ascension
27%inclusion101 decks374 decks
24%synergy
Badgermole Cub
24%inclusion84 decks352 decks
18%synergy
Appa, Steadfast Guardian
18%inclusion76 decks412 decks
17%synergy
Aang, Swift Savior
18%inclusion65 decks368 decks
12%synergy
High Synergy Cards
Restoration Angel
83%inclusion494 decks593 decks
81%synergy
Chameleon, Master of Disguise
81%inclusion329 decks405 decks
79%synergy
Evil Twin
76%inclusion90 decks119 decks
75%synergy
Clever Impersonator
76%inclusion449 decks593 decks
73%synergy
Starfield Vocalist
75%inclusion319 decks424 decks
73%synergy
Stunt Double
70%inclusion413 decks593 decks
69%synergy
Waxen Shapethief
68%inclusion338 decks497 decks
67%synergy
Naga Fleshcrafter
68%inclusion319 decks469 decks
67%synergy
Vizier of Many Faces
67%inclusion400 decks593 decks
67%synergy
Altered Ego
68%inclusion283 decks418 decks
66%synergy
Top Cards
Phyrexian Metamorph
74%inclusion437 decks593 decks
66%synergy
Clone
66%inclusion394 decks593 decks
66%synergy
Dack's Duplicate
66%inclusion42 decks64 decks
65%synergy
Spark Double
65%inclusion384 decks593 decks
58%synergy
Mirrorhall Mimic
65%inclusion383 decks593 decks
64%synergy
Copycrook
62%inclusion344 decks554 decks
62%synergy
Phantasmal Image
61%inclusion363 decks593 decks
59%synergy
Callidus Assassin
58%inclusion69 decks119 decks
57%synergy
Birds of Paradise
57%inclusion237 decks418 decks
29%synergy
Sakashima the Impostor
56%inclusion331 decks593 decks
54%synergy
Game Changers
Demonic Tutor
26%inclusion31 decks119 decks
6%synergy
Ancient Tomb
25%inclusion149 decks593 decks
16%synergy
Worldly Tutor
24%inclusion99 decks418 decks
11%synergy
Gaea's Cradle
23%inclusion95 decks418 decks
17%synergy
Chrome Mox
22%inclusion130 decks593 decks
16%synergy
Mox Diamond
18%inclusion107 decks593 decks
14%synergy
Mana Vault
18%inclusion105 decks593 decks
12%synergy
Crop Rotation
16%inclusion67 decks418 decks
6%synergy
Grim Monolith
11%inclusion63 decks593 decks
9%synergy
Lion's Eye Diamond
10%inclusion62 decks593 decks
9%synergy
Creatures
Flesh Duplicate
54%inclusion321 decks593 decks
53%synergy
Avacyn's Pilgrim
53%inclusion223 decks418 decks
41%synergy
Sakashima of a Thousand Faces
53%inclusion314 decks593 decks
50%synergy
Icewind Stalwart
53%inclusion312 decks593 decks
52%synergy
Visage Bandit
52%inclusion298 decks569 decks
52%synergy
Emiel the Blessed
51%inclusion214 decks418 decks
48%synergy
Eternal Witness
50%inclusion209 decks418 decks
33%synergy
Noble Hierarch
50%inclusion207 decks418 decks
34%synergy
Mirror Image
49%inclusion292 decks593 decks
49%synergy
Gigantoplasm
49%inclusion290 decks593 decks
49%synergy
Superior Spider-Man
47%inclusion17 decks36 decks
46%synergy
Glasspool Mimic
47%inclusion279 decks593 decks
44%synergy
Preston, the Vanisher
47%inclusion277 decks593 decks
46%synergy
Metamorphosis Fanatic
46%inclusion39 decks85 decks
45%synergy
Delighted Halfling
46%inclusion191 decks418 decks
34%synergy
Llanowar Elves
45%inclusion188 decks418 decks
25%synergy
Kroxa and Kunoros
43%inclusion21 decks49 decks
42%synergy
Sister Hospitaller
42%inclusion50 decks119 decks
41%synergy
Soulherder
39%inclusion233 decks593 decks
35%synergy
Colossal Grave-Reaver
39%inclusion11 decks28 decks
34%synergy
Elvish Mystic
38%inclusion160 decks418 decks
22%synergy
Roaming Throne
38%inclusion224 decks593 decks
31%synergy
Wall of Stolen Identity
37%inclusion218 decks593 decks
36%synergy
Jwari Shapeshifter
35%inclusion209 decks593 decks
35%synergy
Ardyn, the Usurper
34%inclusion18 decks53 decks
33%synergy
Sakashima's Student
34%inclusion200 decks593 decks
33%synergy
Charming Prince
29%inclusion173 decks593 decks
27%synergy
Faeburrow Elder
29%inclusion121 decks418 decks
18%synergy
Elvish Spirit Guide
28%inclusion116 decks418 decks
24%synergy
Gyruda, Doom of Depths
27%inclusion32 decks119 decks
25%synergy
Mardu Siegebreaker
27%inclusion8 decks30 decks
21%synergy
Fyndhorn Elves
26%inclusion110 decks418 decks
16%synergy
Bloom Tender
26%inclusion108 decks418 decks
18%synergy
Baleful Strix
24%inclusion29 decks119 decks
11%synergy
Thassa, Deep-Dwelling
24%inclusion143 decks593 decks
21%synergy
Ratadrabik of Urborg
22%inclusion26 decks119 decks
19%synergy
Displacer Kitten
22%inclusion128 decks593 decks
16%synergy
Solemn Simulacrum
21%inclusion126 decks593 decks
8%synergy
Olivia, Crimson Bride
20%inclusion10 decks49 decks
19%synergy
Cloud of Faeries
20%inclusion121 decks593 decks
18%synergy
Flickerwisp
20%inclusion120 decks593 decks
19%synergy
Deadpool, Trading Card
20%inclusion6 decks30 decks
18%synergy
Coiling Oracle
20%inclusion83 decks418 decks
14%synergy
Anger
19%inclusion12 decks64 decks
12%synergy
Voice of Victory
19%inclusion88 decks473 decks
12%synergy
Grand Abolisher
18%inclusion107 decks593 decks
9%synergy
Esper Sentinel
18%inclusion106 decks593 decks
-1%synergy
Ruthless Technomancer
18%inclusion21 decks119 decks
16%synergy
Hoarding Broodlord
17%inclusion20 decks119 decks
15%synergy
Aether Channeler
16%inclusion94 decks593 decks
14%synergy
Instants
Ephemerate
56%inclusion331 decks593 decks
50%synergy
Cloudshift
46%inclusion272 decks593 decks
42%synergy
Swords to Plowshares
40%inclusion237 decks593 decks
-22%synergy
Essence Flux
40%inclusion236 decks593 decks
37%synergy
Momentary Blink
31%inclusion181 decks593 decks
28%synergy
Chord of Calling
26%inclusion110 decks418 decks
21%synergy
An Offer You Can't Refuse
26%inclusion154 decks593 decks
2%synergy
Path to Exile
26%inclusion153 decks593 decks
-21%synergy
Ghostly Flicker
24%inclusion145 decks593 decks
20%synergy
Counterspell
23%inclusion136 decks593 decks
-19%synergy
Eerie Interlude
19%inclusion115 decks593 decks
16%synergy
Swan Song
19%inclusion110 decks593 decks
1%synergy
Cabal Ritual
18%inclusion22 decks119 decks
13%synergy
Silence
16%inclusion96 decks593 decks
10%synergy
Pact of Negation
16%inclusion93 decks593 decks
9%synergy
Force of Will
16%inclusion92 decks593 decks
5%synergy
Enlightened Tutor
15%inclusion87 decks593 decks
-1%synergy
Fierce Guardianship
15%inclusion86 decks593 decks
-3%synergy
Dovin's Veto
14%inclusion84 decks593 decks
-4%synergy
Arcane Denial
13%inclusion77 decks593 decks
-7%synergy
Negate
13%inclusion75 decks593 decks
-9%synergy
Drown in the Loch
12%inclusion14 decks119 decks
7%synergy
Fell the Profane
11%inclusion11 decks97 decks
2%synergy
Eladamri's Call
11%inclusion47 decks418 decks
2%synergy
Mindbreak Trap
11%inclusion65 decks593 decks
6%synergy
Despark
11%inclusion13 decks119 decks
-3%synergy
Cyclonic Rift
11%inclusion63 decks593 decks
-13%synergy
Lae'zel's Acrobatics
10%inclusion62 decks593 decks
9%synergy
Heroic Intervention
10%inclusion42 decks418 decks
-20%synergy
Flusterstorm
10%inclusion57 decks593 decks
2%synergy
Generous Gift
9.4%inclusion56 decks593 decks
-13%synergy
Beast Within
9.3%inclusion39 decks418 decks
-25%synergy
Tainted Pact
9.2%inclusion11 decks119 decks
5%synergy
Parting Gust
9.2%inclusion50 decks543 decks
7%synergy
Flicker of Fate
8.9%inclusion53 decks593 decks
7%synergy
Displace
8.4%inclusion50 decks593 decks
7%synergy
Lim-Dûl's Vault
8.4%inclusion10 decks119 decks
5%synergy
Planar Incision
8.1%inclusion48 decks593 decks
7%synergy
Desperate Ritual
7.8%inclusion5 decks64 decks
5%synergy
Pyretic Ritual
7.8%inclusion5 decks64 decks
5%synergy
Hide on the Ceiling
7.7%inclusion31 decks404 decks
6%synergy
Force of Negation
7.6%inclusion45 decks593 decks
-1%synergy
Snap
7.4%inclusion44 decks593 decks
0%synergy
Mana Drain
7.4%inclusion44 decks593 decks
-7%synergy
Brainstorm
7.4%inclusion44 decks593 decks
-11%synergy
Blur
6.7%inclusion40 decks593 decks
5%synergy
Semester's End
6.7%inclusion40 decks593 decks
5%synergy
Utter End
6.7%inclusion8 decks119 decks
2%synergy
Dispel
6.6%inclusion39 decks593 decks
3%synergy
Thrill of Possibility
6.3%inclusion4 decks64 decks
-3%synergy
Sorceries
Dread Return
49%inclusion58 decks119 decks
44%synergy
Farseek
29%inclusion123 decks418 decks
-6%synergy
Nature's Lore
26%inclusion107 decks418 decks
-6%synergy
Rampant Growth
21%inclusion87 decks418 decks
-13%synergy
Finale of Devastation
21%inclusion86 decks418 decks
13%synergy
Three Visits
19%inclusion80 decks418 decks
-5%synergy
Eldritch Evolution
18%inclusion77 decks418 decks
14%synergy
Nature's Rhythm
17%inclusion67 decks384 decks
13%synergy
Cultivate
17%inclusion72 decks418 decks
-26%synergy
Culling Ritual
17%inclusion8 decks48 decks
6%synergy
Avatar's Wrath
16%inclusion60 decks369 decks
12%synergy
Kodama's Reach
14%inclusion59 decks418 decks
-14%synergy
Damn
13%inclusion15 decks119 decks
-3%synergy
Green Sun's Zenith
12%inclusion49 decks418 decks
7%synergy
Shared Roots
11%inclusion39 decks343 decks
6%synergy
Persist
10%inclusion12 decks119 decks
8%synergy
Neoform
7.9%inclusion33 decks418 decks
4%synergy
Splash Portal
7.2%inclusion39 decks542 decks
6%synergy
Diabolic Tutor
6.7%inclusion8 decks119 decks
1%synergy
Wargate
6.5%inclusion27 decks418 decks
4%synergy
Irenicus's Vile Duplication
6.1%inclusion36 decks593 decks
3%synergy
Calamity of Cinders
6.0%inclusion3 decks50 decks
5%synergy
Supreme Verdict
5.9%inclusion35 decks593 decks
-7%synergy
Stitch Together
5.9%inclusion7 decks119 decks
4%synergy
Diabolic Intent
5.9%inclusion7 decks119 decks
-2%synergy
Feed the Swarm
5.9%inclusion7 decks119 decks
-11%synergy
Time Wipe
5.7%inclusion34 decks593 decks
0%synergy
Austere Command
5.6%inclusion33 decks593 decks
-7%synergy
Another Round
5.1%inclusion29 decks569 decks
4%synergy
Unmarked Grave
5.0%inclusion6 decks119 decks
3%synergy
Utility Artifacts
Panharmonicon
48%inclusion285 decks593 decks
44%synergy
Conjurer's Closet
14%inclusion82 decks593 decks
11%synergy
Mirror Box
13%inclusion75 decks593 decks
12%synergy
Wishclaw Talisman
11%inclusion13 decks119 decks
6%synergy
Swiftfoot Boots
7.1%inclusion42 decks593 decks
-20%synergy
The One Ring
6.6%inclusion39 decks593 decks
-2%synergy
Altar of the Brood
6.2%inclusion37 decks593 decks
5%synergy
Strionic Resonator
5.2%inclusion31 decks593 decks
3%synergy
Lightning Greaves
5.1%inclusion30 decks593 decks
-20%synergy
Enchantments
Wild Growth
30%inclusion127 decks418 decks
20%synergy
Animate Dead
27%inclusion32 decks119 decks
18%synergy
Mystic Remora
20%inclusion119 decks593 decks
4%synergy
Food Chain
20%inclusion83 decks418 decks
18%synergy
Teleportation Circle
20%inclusion116 decks593 decks
16%synergy
Heartless Summoning
19%inclusion23 decks119 decks
18%synergy
Utopia Sprawl
19%inclusion80 decks418 decks
11%synergy
Smothering Tithe
18%inclusion108 decks593 decks
-4%synergy
Rhystic Study
17%inclusion103 decks593 decks
-7%synergy
Touch the Spirit Realm
16%inclusion93 decks593 decks
14%synergy
Elemental Bond
16%inclusion65 decks418 decks
11%synergy
Sneak Attack
14%inclusion9 decks64 decks
12%synergy
Dance of the Dead
13%inclusion15 decks119 decks
11%synergy
Virtue of Knowledge
11%inclusion64 decks593 decks
9%synergy
Annie Joins Up
10%inclusion4 decks40 decks
-3%synergy
Carpet of Flowers
10%inclusion40 decks418 decks
6%synergy
Impact Tremors
9.4%inclusion6 decks64 decks
-1%synergy
Mirror March
7.8%inclusion5 decks64 decks
7%synergy
Molten Echoes
7.8%inclusion5 decks64 decks
6%synergy
Crescent Island Temple
7.7%inclusion1 decks13 decks
6%synergy
Mortuary
7.6%inclusion9 decks119 decks
7%synergy
Sylvan Library
6.9%inclusion29 decks418 decks
-2%synergy
Guardian Project
6.7%inclusion28 decks418 decks
-1%synergy
Underworld Breach
6.3%inclusion4 decks64 decks
0%synergy
Earthbender Ascension
5.6%inclusion19 decks339 decks
1%synergy
Deafening Silence
5.6%inclusion33 decks593 decks
4%synergy
Planeswalkers
Saheeli Rai
6.3%inclusion4 decks64 decks
5%synergy
Utility Lands
Boseiju, Who Endures
36%inclusion152 decks418 decks
18%synergy
Otawara, Soaring City
26%inclusion154 decks593 decks
10%synergy
Reliquary Tower
19%inclusion112 decks593 decks
-11%synergy
Bojuka Bog
13%inclusion15 decks119 decks
-17%synergy
City of Traitors
11%inclusion66 decks593 decks
10%synergy
Yavimaya, Cradle of Growth
11%inclusion63 decks593 decks
2%synergy
Takenuma, Abandoned Mire
10%inclusion12 decks119 decks
1%synergy
Mistrise Village
8.5%inclusion40 decks471 decks
0%synergy
Shifting Woodland
8.4%inclusion34 decks405 decks
1%synergy
Peat Bog
7.6%inclusion9 decks119 decks
7%synergy
Alchemist's Refuge
6.9%inclusion29 decks418 decks
1%synergy
Abandoned Air Temple
6.8%inclusion24 decks355 decks
2%synergy
Witch's Cottage
6.7%inclusion8 decks119 decks
3%synergy
Phyrexian Tower
6.7%inclusion8 decks119 decks
-2%synergy
Crystal Vein
6.6%inclusion39 decks593 decks
6%synergy
Urza's Saga
6.4%inclusion38 decks593 decks
-1%synergy
Ba Sing Se
5.4%inclusion18 decks336 decks
-1%synergy
Dryad Arbor
5.3%inclusion22 decks418 decks
1%synergy
Secret Tunnel
5.1%inclusion19 decks371 decks
2%synergy
Mortuary Mire
5.0%inclusion6 decks119 decks
1%synergy
Mana Artifacts
Arcane Signet
80%inclusion473 decks593 decks
8%synergy
Sol Ring
74%inclusion436 decks593 decks
-10%synergy
Talisman of Dominance
54%inclusion64 decks119 decks
21%synergy
Talisman of Hierarchy
42%inclusion50 decks119 decks
16%synergy
Fellwar Stone
40%inclusion238 decks593 decks
20%synergy
Talisman of Progress
32%inclusion192 decks593 decks
7%synergy
Orzhov Signet
29%inclusion35 decks119 decks
5%synergy
Dimir Signet
29%inclusion35 decks119 decks
4%synergy
Talisman of Curiosity
28%inclusion116 decks418 decks
15%synergy
Talisman of Creativity
25%inclusion16 decks64 decks
-3%synergy
Lotus Petal
24%inclusion140 decks593 decks
17%synergy
Talisman of Unity
22%inclusion94 decks418 decks
15%synergy
Azorius Signet
20%inclusion118 decks593 decks
-2%synergy
Talisman of Resilience
19%inclusion9 decks48 decks
6%synergy
Izzet Signet
17%inclusion11 decks64 decks
-7%synergy
Talisman of Indulgence
16%inclusion8 decks49 decks
-12%synergy
Talisman of Conviction
14%inclusion9 decks64 decks
-10%synergy
Mind Stone
11%inclusion68 decks593 decks
-4%synergy
Boros Signet
11%inclusion7 decks64 decks
-9%synergy
Relic of Legends
10%inclusion62 decks593 decks
8%synergy
Thought Vessel
10%inclusion61 decks593 decks
-7%synergy
Talisman of Impulse
8.9%inclusion4 decks45 decks
-2%synergy
Simic Signet
7.2%inclusion30 decks418 decks
-5%synergy
Cursed Mirror
6.3%inclusion4 decks64 decks
1%synergy
Relic of Sauron
6.1%inclusion3 decks49 decks
-2%synergy
Machine God's Effigy
6.1%inclusion36 decks593 decks
5%synergy
Charcoal Diamond
5.9%inclusion7 decks119 decks
2%synergy
Commander's Sphere
5.7%inclusion34 decks593 decks
-7%synergy
Mox Amber
5.2%inclusion31 decks593 decks
1%synergy
Selesnya Signet
5.0%inclusion21 decks418 decks
-3%synergy
Lands
Command Tower
91%inclusion541 decks593 decks
17%synergy
Breeding Pool
61%inclusion256 decks418 decks
20%synergy
Temple Garden
55%inclusion230 decks418 decks
17%synergy
Exotic Orchard
54%inclusion321 decks593 decks
18%synergy
Hallowed Fountain
51%inclusion301 decks593 decks
11%synergy
Watery Grave
47%inclusion56 decks119 decks
6%synergy
Flooded Strand
47%inclusion278 decks593 decks
36%synergy
Misty Rainforest
41%inclusion245 decks593 decks
30%synergy
Windswept Heath
41%inclusion243 decks593 decks
30%synergy
Overgrown Tomb
40%inclusion19 decks48 decks
-1%synergy
Godless Shrine
39%inclusion47 decks119 decks
-1%synergy
Yavimaya Coast
35%inclusion148 decks418 decks
8%synergy
Tropical Island
34%inclusion143 decks418 decks
20%synergy
Glacial Fortress
34%inclusion200 decks593 decks
2%synergy
Rejuvenating Springs
33%inclusion140 decks418 decks
6%synergy
Hinterland Harbor
33%inclusion138 decks418 decks
0%synergy
Badlands
33%inclusion16 decks49 decks
19%synergy
Savannah
32%inclusion135 decks418 decks
20%synergy
Spara's Headquarters
32%inclusion135 decks418 decks
4%synergy
Prairie Stream
32%inclusion190 decks593 decks
-2%synergy
Raffine's Tower
32%inclusion38 decks119 decks
7%synergy
Bayou
31%inclusion15 decks48 decks
18%synergy
Polluted Delta
31%inclusion183 decks593 decks
19%synergy
Volcanic Island
30%inclusion19 decks64 decks
16%synergy
Adarkar Wastes
29%inclusion173 decks593 decks
6%synergy
Sea of Clouds
29%inclusion173 decks593 decks
4%synergy
Tundra
29%inclusion170 decks593 decks
15%synergy
Mana Confluence
28%inclusion165 decks593 decks
21%synergy
Scalding Tarn
28%inclusion165 decks593 decks
17%synergy
Brushland
28%inclusion116 decks418 decks
9%synergy
Canopy Vista
28%inclusion116 decks418 decks
-9%synergy
Marsh Flats
27%inclusion162 decks593 decks
17%synergy
City of Brass
27%inclusion160 decks593 decks
19%synergy
Underground Sea
27%inclusion32 decks119 decks
12%synergy
Undercity Sewers
27%inclusion31 decks116 decks
16%synergy
Steam Vents
27%inclusion17 decks64 decks
-11%synergy
Bountiful Promenade
27%inclusion111 decks418 decks
4%synergy
Verdant Catacombs
26%inclusion157 decks593 decks
16%synergy
Wooded Foothills
26%inclusion153 decks593 decks
15%synergy
Sunpetal Grove
26%inclusion107 decks418 decks
-2%synergy
Arcane Sanctum
25%inclusion30 decks119 decks
-3%synergy
Cavern of Souls
25%inclusion148 decks593 decks
18%synergy
Stomping Ground
24%inclusion11 decks45 decks
-16%synergy
Dreamroot Cascade
24%inclusion102 decks418 decks
3%synergy
Scrubland
24%inclusion28 decks119 decks
10%synergy
Sunken Hollow
24%inclusion28 decks119 decks
-11%synergy
Gemstone Caverns
22%inclusion133 decks593 decks
17%synergy
Arid Mesa
22%inclusion133 decks593 decks
12%synergy
Taiga
22%inclusion10 decks45 decks
9%synergy
Sacred Foundry
22%inclusion14 decks64 decks
-14%synergy