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%inclusion768 decks4.90K decks
Brago, King Eternal
0.2%inclusion22 decks13.3K decks
Abdel Adrian, Gorion's Ward // Candlekeep Sage
0.5%inclusion20 decks4.39K decks
Yorion, Sky Nomad
0.6%inclusion16 decks2.53K decks
Lagrella, the Magpie
0.7%inclusion13 decks1.94K decks
The Wandering Minstrel
0.1%inclusion10 decks15.5K decks
Reaper King
0.1%inclusion9 decks8.37K decks
Aminatou, the Fateshifter
0.1%inclusion8 decks6.67K decks
Sharuum the Hegemon
0.3%inclusion8 decks2.94K decks
Hashaton, Scarab's Fist
0.0%inclusion8 decks22.7K decks
Helga, Skittish Seer
0.0%inclusion7 decks17.6K decks
Jodah, Archmage Eternal
0.1%inclusion7 decks8.86K decks
Roon of the Hidden Realm
0.2%inclusion6 decks3.35K decks
Bane, Lord of Darkness
0.3%inclusion6 decks2.37K decks
Niko, Light of Hope
0.1%inclusion5 decks8.76K decks
Livio, Oathsworn Sentinel // Sakashima of a Thousand Faces
10%inclusion5 decks49 decks
Sefris of the Hidden Ways
0.0%inclusion5 decks11.5K decks
Sakashima of a Thousand Faces // Yoshimaru, Ever Faithful
1.0%inclusion5 decks523 decks
New Cards
Ennis, Debate Moderator
9.4%inclusion8 decks85 decks
9%synergy
Skycoach Conductor
2.1%inclusion2 decks95 decks
2%synergy
Continue?
1.9%inclusion7 decks368 decks
0%synergy
Daydream
1.7%inclusion2 decks115 decks
1%synergy
Paradox Surveyor
1.1%inclusion1 decks91 decks
1%synergy
High Synergy Cards
Restoration Angel
88%inclusion899 decks1.02K decks
86%synergy
Chameleon, Master of Disguise
85%inclusion744 decks878 decks
82%synergy
Starfield Vocalist
83%inclusion742 decks893 decks
81%synergy
Evil Twin
80%inclusion84 decks105 decks
79%synergy
Clever Impersonator
81%inclusion831 decks1.02K decks
79%synergy
Katara, the Fearless
80%inclusion653 decks812 decks
77%synergy
Waxen Shapethief
75%inclusion726 decks964 decks
75%synergy
Naga Fleshcrafter
75%inclusion702 decks937 decks
74%synergy
Vizier of Many Faces
75%inclusion761 decks1.02K decks
74%synergy
Altered Ego
75%inclusion633 decks847 decks
73%synergy
Top Cards
Phyrexian Metamorph
80%inclusion815 decks1.02K decks
73%synergy
Clone
73%inclusion741 decks1.02K decks
72%synergy
Stunt Double
72%inclusion734 decks1.02K decks
71%synergy
Spark Double
70%inclusion718 decks1.02K decks
64%synergy
Mirrorhall Mimic
68%inclusion698 decks1.02K decks
68%synergy
Copycrook
68%inclusion694 decks1.01K decks
68%synergy
Phantasmal Image
68%inclusion695 decks1.02K decks
66%synergy
Icewind Stalwart
66%inclusion672 decks1.02K decks
66%synergy
Dack's Duplicate
65%inclusion41 decks63 decks
65%synergy
Visage Bandit
63%inclusion646 decks1.02K decks
63%synergy
Game Changers
Ancient Tomb
31%inclusion314 decks1.02K decks
21%synergy
Chrome Mox
28%inclusion288 decks1.02K decks
22%synergy
Gaea's Cradle
25%inclusion210 decks847 decks
19%synergy
Worldly Tutor
25%inclusion209 decks847 decks
13%synergy
Mana Vault
25%inclusion251 decks1.02K decks
19%synergy
Mox Diamond
23%inclusion231 decks1.02K decks
18%synergy
Crop Rotation
23%inclusion191 decks847 decks
13%synergy
Force of Will
19%inclusion196 decks1.02K decks
10%synergy
Lion's Eye Diamond
16%inclusion159 decks1.02K decks
14%synergy
Grim Monolith
14%inclusion139 decks1.02K decks
12%synergy
Creatures
Mirror Image
63%inclusion641 decks1.02K decks
62%synergy
Callidus Assassin
62%inclusion65 decks105 decks
61%synergy
Sakashima the Impostor
61%inclusion623 decks1.02K decks
59%synergy
Sakashima of a Thousand Faces
61%inclusion621 decks1.02K decks
58%synergy
Birds of Paradise
60%inclusion507 decks847 decks
32%synergy
Flesh Duplicate
60%inclusion607 decks1.02K decks
58%synergy
Glasspool Mimic
58%inclusion594 decks1.02K decks
56%synergy
Gigantoplasm
55%inclusion564 decks1.02K decks
55%synergy
Preston, the Vanisher
55%inclusion563 decks1.02K decks
54%synergy
Avacyn's Pilgrim
54%inclusion459 decks847 decks
42%synergy
Delighted Halfling
51%inclusion431 decks847 decks
39%synergy
Noble Hierarch
51%inclusion429 decks847 decks
35%synergy
Eternal Witness
50%inclusion420 decks847 decks
33%synergy
Roaming Throne
49%inclusion499 decks1.02K decks
43%synergy
Emiel the Blessed
48%inclusion406 decks847 decks
45%synergy
Jwari Shapeshifter
46%inclusion473 decks1.02K decks
46%synergy
Llanowar Elves
46%inclusion391 decks847 decks
26%synergy
Metamorphosis Fanatic
46%inclusion42 decks91 decks
45%synergy
Soulherder
44%inclusion446 decks1.02K decks
39%synergy
Colossal Grave-Reaver
42%inclusion13 decks31 decks
37%synergy
Superior Spider-Man
42%inclusion20 decks48 decks
40%synergy
Sister Hospitaller
39%inclusion41 decks105 decks
38%synergy
Elvish Mystic
38%inclusion326 decks847 decks
23%synergy
Elvish Spirit Guide
38%inclusion324 decks847 decks
34%synergy
Sakashima's Student
38%inclusion385 decks1.02K decks
37%synergy
Wall of Stolen Identity
37%inclusion378 decks1.02K decks
37%synergy
Kroxa and Kunoros
37%inclusion17 decks46 decks
37%synergy
Gyruda, Doom of Depths
34%inclusion36 decks105 decks
33%synergy
Ardyn, the Usurper
33%inclusion21 decks63 decks
32%synergy
Charming Prince
32%inclusion326 decks1.02K decks
30%synergy
Badgermole Cub
29%inclusion230 decks800 decks
24%synergy
Thassa, Deep-Dwelling
27%inclusion278 decks1.02K decks
25%synergy
Faeburrow Elder
27%inclusion228 decks847 decks
15%synergy
Bloom Tender
27%inclusion225 decks847 decks
18%synergy
Flickerwisp
26%inclusion267 decks1.02K decks
25%synergy
Mardu Siegebreaker
26%inclusion9 decks35 decks
21%synergy
Fyndhorn Elves
25%inclusion210 decks847 decks
15%synergy
Jackdaw Savior
24%inclusion237 decks1K decks
23%synergy
Ratadrabik of Urborg
23%inclusion24 decks105 decks
20%synergy
Baleful Strix
23%inclusion24 decks105 decks
10%synergy
Supportive Parents
23%inclusion183 decks809 decks
22%synergy
White Plume Adventurer
21%inclusion219 decks1.02K decks
20%synergy
Cloud of Faeries
21%inclusion218 decks1.02K decks
19%synergy
Phelia, Exuberant Shepherd
21%inclusion209 decks1.02K decks
19%synergy
Brenard, Ginger Sculptor
20%inclusion172 decks847 decks
20%synergy
Coiling Oracle
20%inclusion170 decks847 decks
14%synergy
Deadpool, Trading Card
20%inclusion7 decks35 decks
18%synergy
Voice of Victory
20%inclusion188 decks941 decks
14%synergy
Esper Sentinel
20%inclusion203 decks1.02K decks
1%synergy
Aang, Swift Savior
19%inclusion163 decks847 decks
15%synergy
Instants
Ephemerate
60%inclusion608 decks1.02K decks
54%synergy
Cloudshift
51%inclusion522 decks1.02K decks
47%synergy
Essence Flux
47%inclusion482 decks1.02K decks
44%synergy
Swords to Plowshares
41%inclusion421 decks1.02K decks
-20%synergy
An Offer You Can't Refuse
29%inclusion298 decks1.02K decks
4%synergy
Momentary Blink
27%inclusion278 decks1.02K decks
25%synergy
Path to Exile
27%inclusion277 decks1.02K decks
-20%synergy
Chord of Calling
22%inclusion187 decks847 decks
17%synergy
Counterspell
22%inclusion225 decks1.02K decks
-20%synergy
Ghostly Flicker
21%inclusion219 decks1.02K decks
17%synergy
Swan Song
21%inclusion219 decks1.02K decks
4%synergy
Silence
21%inclusion213 decks1.02K decks
15%synergy
Enlightened Tutor
21%inclusion212 decks1.02K decks
6%synergy
Cabal Ritual
19%inclusion20 decks105 decks
14%synergy
Fierce Guardianship
18%inclusion184 decks1.02K decks
1%synergy
Pact of Negation
17%inclusion170 decks1.02K decks
10%synergy
Eerie Interlude
15%inclusion157 decks1.02K decks
12%synergy
Mindbreak Trap
14%inclusion140 decks1.02K decks
9%synergy
Drown in the Loch
12%inclusion13 decks105 decks
8%synergy
Flusterstorm
12%inclusion123 decks1.02K decks
5%synergy
Fell the Profane
12%inclusion12 decks102 decks
3%synergy
Dovin's Veto
11%inclusion117 decks1.02K decks
-7%synergy
Parting Gust
11%inclusion112 decks1K decks
9%synergy
Force of Negation
11%inclusion111 decks1.02K decks
3%synergy
Arcane Denial
11%inclusion109 decks1.02K decks
-9%synergy
Tainted Pact
10%inclusion11 decks105 decks
7%synergy
Negate
10%inclusion106 decks1.02K decks
-10%synergy
Heroic Intervention
10%inclusion88 decks847 decks
-20%synergy
Eladamri's Call
9.4%inclusion80 decks847 decks
1%synergy
Mental Misstep
9.4%inclusion96 decks1.02K decks
4%synergy
Flicker of Fate
9.1%inclusion93 decks1.02K decks
7%synergy
Cyclonic Rift
9.1%inclusion93 decks1.02K decks
-12%synergy
Beast Within
9.1%inclusion77 decks847 decks
-24%synergy
Snap
8.8%inclusion90 decks1.02K decks
1%synergy
Lae'zel's Acrobatics
7.9%inclusion81 decks1.02K decks
7%synergy
Into the Flood Maw
7.7%inclusion77 decks1K decks
4%synergy
Lim-Dûl's Vault
7.6%inclusion8 decks105 decks
5%synergy
Utter End
7.6%inclusion8 decks105 decks
3%synergy
Despark
7.6%inclusion8 decks105 decks
-6%synergy
Hide on the Ceiling
7.4%inclusion65 decks877 decks
6%synergy
Generous Gift
7.2%inclusion73 decks1.02K decks
-14%synergy
Sink into Stupor
7.1%inclusion72 decks1.01K decks
-3%synergy
Brainstorm
7.0%inclusion71 decks1.02K decks
-11%synergy
Dispel
6.9%inclusion70 decks1.02K decks
3%synergy
Deadly Rollick
6.7%inclusion7 decks105 decks
-7%synergy
Desperate Ritual
6.3%inclusion4 decks63 decks
3%synergy
Pyretic Ritual
6.3%inclusion4 decks63 decks
3%synergy
Deflecting Swat
6.3%inclusion4 decks63 decks
-11%synergy
Planar Incision
6.3%inclusion64 decks1.02K decks
5%synergy
Spell Pierce
6.3%inclusion64 decks1.02K decks
3%synergy
Sorceries
Dread Return
49%inclusion51 decks105 decks
44%synergy
Farseek
27%inclusion231 decks847 decks
-9%synergy
Demonic Tutor
26%inclusion27 decks105 decks
7%synergy
Nature's Lore
22%inclusion187 decks847 decks
-9%synergy
Finale of Devastation
21%inclusion180 decks847 decks
14%synergy
Rampant Growth
19%inclusion162 decks847 decks
-14%synergy
Eldritch Evolution
17%inclusion147 decks847 decks
13%synergy
Nature's Rhythm
17%inclusion142 decks826 decks
13%synergy
Culling Ritual
17%inclusion7 decks42 decks
6%synergy
Avatar's Wrath
16%inclusion138 decks847 decks
12%synergy
Three Visits
16%inclusion135 decks847 decks
-8%synergy
Cultivate
14%inclusion121 decks847 decks
-28%synergy
Green Sun's Zenith
13%inclusion107 decks847 decks
7%synergy
Kodama's Reach
12%inclusion103 decks847 decks
-14%synergy
Persist
10%inclusion11 decks105 decks
8%synergy
Damn
10%inclusion11 decks105 decks
-5%synergy
Shared Roots
10%inclusion77 decks792 decks
5%synergy
Splash Portal
7.2%inclusion72 decks1K decks
6%synergy
Diabolic Intent
6.7%inclusion7 decks105 decks
-1%synergy
Neoform
5.9%inclusion50 decks847 decks
2%synergy
Extinction Event
5.7%inclusion6 decks105 decks
5%synergy
Stitch Together
5.7%inclusion6 decks105 decks
4%synergy
Diabolic Tutor
5.7%inclusion6 decks105 decks
0%synergy
Buried Alive
5.7%inclusion6 decks105 decks
0%synergy
Singularity Rupture
5.5%inclusion3 decks55 decks
2%synergy
Utility Artifacts
Panharmonicon
50%inclusion515 decks1.02K decks
46%synergy
Mirror Box
14%inclusion145 decks1.02K decks
13%synergy
Conjurer's Closet
13%inclusion132 decks1.02K decks
10%synergy
Wishclaw Talisman
10%inclusion11 decks105 decks
5%synergy
Altar of the Brood
6.6%inclusion67 decks1.02K decks
5%synergy
The One Ring
5.8%inclusion59 decks1.02K decks
-2%synergy
Enchantments
Wild Growth
36%inclusion307 decks847 decks
26%synergy
Airbender Ascension
31%inclusion260 decks852 decks
28%synergy
Animate Dead
26%inclusion27 decks105 decks
17%synergy
Food Chain
26%inclusion216 decks847 decks
24%synergy
Heartless Summoning
22%inclusion23 decks105 decks
21%synergy
Mystic Remora
21%inclusion218 decks1.02K decks
6%synergy
Utopia Sprawl
21%inclusion180 decks847 decks
14%synergy
Touch the Spirit Realm
20%inclusion207 decks1.02K decks
18%synergy
Rhystic Study
18%inclusion185 decks1.02K decks
-5%synergy
Teleportation Circle
15%inclusion155 decks1.02K decks
12%synergy
Smothering Tithe
14%inclusion146 decks1.02K decks
-6%synergy
Dance of the Dead
14%inclusion15 decks105 decks
13%synergy
Elemental Bond
13%inclusion111 decks847 decks
8%synergy
Sneak Attack
13%inclusion8 decks63 decks
10%synergy
Deafening Silence
12%inclusion118 decks1.02K decks
10%synergy
Annie Joins Up
10%inclusion4 decks41 decks
-3%synergy
Carpet of Flowers
10%inclusion82 decks847 decks
7%synergy
Impact Tremors
10%inclusion6 decks63 decks
0%synergy
Virtue of Knowledge
9.3%inclusion95 decks1.02K decks
8%synergy
Birthing Ritual
8.9%inclusion75 decks844 decks
8%synergy
Cream of the Crop
8.7%inclusion74 decks847 decks
8%synergy
Mortuary
6.7%inclusion7 decks105 decks
7%synergy
Mirror March
6.3%inclusion4 decks63 decks
5%synergy
Molten Echoes
6.3%inclusion4 decks63 decks
5%synergy
Underworld Breach
6.3%inclusion4 decks63 decks
0%synergy
Sylvan Library
5.4%inclusion46 decks847 decks
-3%synergy
Planeswalkers
Saheeli Rai
6.3%inclusion4 decks63 decks
5%synergy
Utility Lands
Boseiju, Who Endures
36%inclusion306 decks847 decks
17%synergy
Otawara, Soaring City
30%inclusion309 decks1.02K decks
14%synergy
City of Traitors
15%inclusion152 decks1.02K decks
14%synergy
Reliquary Tower
14%inclusion145 decks1.02K decks
-16%synergy
Yavimaya, Cradle of Growth
12%inclusion126 decks1.02K decks
4%synergy
Takenuma, Abandoned Mire
11%inclusion12 decks105 decks
3%synergy
Crystal Vein
11%inclusion114 decks1.02K decks
10%synergy
Bojuka Bog
10%inclusion11 decks105 decks
-19%synergy
Cephalid Coliseum
10%inclusion100 decks1.02K decks
6%synergy
Mistrise Village
8.7%inclusion82 decks939 decks
1%synergy
Peat Bog
7.6%inclusion8 decks105 decks
7%synergy
Witch's Cottage
7.6%inclusion8 decks105 decks
4%synergy
Great Hall of the Citadel
6.7%inclusion68 decks1.02K decks
6%synergy
Alchemist's Refuge
6.4%inclusion54 decks847 decks
0%synergy
Urza's Saga
6.3%inclusion64 decks1.02K decks
-1%synergy
Dryad Arbor
5.8%inclusion49 decks847 decks
2%synergy
Phyrexian Tower
5.7%inclusion6 decks105 decks
-3%synergy
Abandoned Air Temple
5.5%inclusion46 decks835 decks
1%synergy
Shifting Woodland
5.3%inclusion45 decks844 decks
-2%synergy
Mana Artifacts
Sol Ring
81%inclusion830 decks1.02K decks
-2%synergy
Arcane Signet
77%inclusion781 decks1.02K decks
4%synergy
Talisman of Dominance
52%inclusion55 decks105 decks
20%synergy
Talisman of Hierarchy
40%inclusion42 decks105 decks
14%synergy
Fellwar Stone
37%inclusion377 decks1.02K decks
17%synergy
Lotus Petal
31%inclusion318 decks1.02K decks
24%synergy
Orzhov Signet
30%inclusion32 decks105 decks
8%synergy
Dimir Signet
30%inclusion32 decks105 decks
7%synergy
Talisman of Progress
28%inclusion285 decks1.02K decks
3%synergy
Talisman of Curiosity
27%inclusion230 decks847 decks
15%synergy
Talisman of Creativity
25%inclusion16 decks63 decks
-2%synergy
Talisman of Unity
20%inclusion169 decks847 decks
13%synergy
Talisman of Resilience
19%inclusion8 decks42 decks
7%synergy
Izzet Signet
17%inclusion11 decks63 decks
-6%synergy
Talisman of Indulgence
17%inclusion8 decks46 decks
-10%synergy
Relic of Legends
16%inclusion160 decks1.02K decks
13%synergy
Talisman of Conviction
14%inclusion9 decks63 decks
-10%synergy
Azorius Signet
14%inclusion138 decks1.02K decks
-7%synergy
Boros Signet
11%inclusion7 decks63 decks
-8%synergy
Pentad Prism
8.6%inclusion88 decks1.02K decks
8%synergy
Cursed Mirror
7.9%inclusion5 decks63 decks
2%synergy
Mind Stone
6.9%inclusion70 decks1.02K decks
-7%synergy
Thought Vessel
6.9%inclusion70 decks1.02K decks
-10%synergy
Relic of Sauron
6.5%inclusion3 decks46 decks
-1%synergy
Charcoal Diamond
5.7%inclusion6 decks105 decks
2%synergy
Bender's Waterskin
5.4%inclusion48 decks882 decks
2%synergy
Simic Signet
5.4%inclusion46 decks847 decks
-5%synergy
Mox Amber
5.2%inclusion53 decks1.02K decks
1%synergy
Lands
Command Tower
93%inclusion951 decks1.02K decks
19%synergy
Breeding Pool
61%inclusion514 decks847 decks
19%synergy
Temple Garden
57%inclusion479 decks847 decks
17%synergy
Exotic Orchard
55%inclusion565 decks1.02K decks
19%synergy
Hallowed Fountain
53%inclusion544 decks1.02K decks
13%synergy
Flooded Strand
52%inclusion532 decks1.02K decks
41%synergy
Windswept Heath
48%inclusion494 decks1.02K decks
37%synergy
Misty Rainforest
48%inclusion486 decks1.02K decks
36%synergy
Watery Grave
47%inclusion49 decks105 decks
5%synergy
Godless Shrine
39%inclusion41 decks105 decks
-2%synergy
Tropical Island
38%inclusion326 decks847 decks
24%synergy
Overgrown Tomb
38%inclusion16 decks42 decks
-3%synergy
Savannah
37%inclusion316 decks847 decks
25%synergy
Yavimaya Coast
37%inclusion310 decks847 decks
10%synergy
Hinterland Harbor
35%inclusion296 decks847 decks
1%synergy
Glacial Fortress
34%inclusion351 decks1.02K decks
1%synergy
Tundra
34%inclusion342 decks1.02K decks
20%synergy
City of Brass
33%inclusion341 decks1.02K decks
26%synergy
Polluted Delta
33%inclusion339 decks1.02K decks
21%synergy
Badlands
33%inclusion15 decks46 decks
19%synergy
Adarkar Wastes
32%inclusion324 decks1.02K decks
8%synergy
Raffine's Tower
31%inclusion33 decks105 decks
8%synergy
Wooded Foothills
31%inclusion318 decks1.02K decks
20%synergy
Brushland
31%inclusion263 decks847 decks
11%synergy
Bayou
31%inclusion13 decks42 decks
18%synergy
Mana Confluence
31%inclusion312 decks1.02K decks
24%synergy
Scalding Tarn
30%inclusion311 decks1.02K decks
20%synergy
Prairie Stream
30%inclusion309 decks1.02K decks
-2%synergy
Cavern of Souls
30%inclusion308 decks1.02K decks
23%synergy
Rejuvenating Springs
30%inclusion252 decks847 decks
4%synergy
Gemstone Caverns
30%inclusion302 decks1.02K decks
25%synergy
Verdant Catacombs
29%inclusion295 decks1.02K decks
18%synergy
Volcanic Island
29%inclusion18 decks63 decks
15%synergy
Sunpetal Grove
28%inclusion233 decks847 decks
-1%synergy
Marsh Flats
27%inclusion280 decks1.02K decks
17%synergy
Canopy Vista
27%inclusion232 decks847 decks
-8%synergy
Steam Vents
27%inclusion17 decks63 decks
-12%synergy
Underground Sea
27%inclusion28 decks105 decks
12%synergy
Arcane Sanctum
27%inclusion28 decks105 decks
-1%synergy
Sea of Clouds
27%inclusion271 decks1.02K decks
3%synergy
Zagoth Triome
26%inclusion11 decks42 decks
-1%synergy
Spara's Headquarters
26%inclusion221 decks847 decks
-1%synergy
Undercity Sewers
26%inclusion27 decks105 decks
14%synergy
Dreamroot Cascade
24%inclusion207 decks847 decks
3%synergy
Arid Mesa
24%inclusion240 decks1.02K decks
13%synergy
Bountiful Promenade
23%inclusion199 decks847 decks
2%synergy
Scrubland
23%inclusion24 decks105 decks
9%synergy
Sunken Hollow
23%inclusion24 decks105 decks
-11%synergy
Taiga
22%inclusion9 decks41 decks
9%synergy
Shadowy Backstreet
22%inclusion23 decks105 decks
12%synergy