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%inclusion748 decks4.77K decks
Brago, King Eternal
0.2%inclusion22 decks13.1K decks
Abdel Adrian, Gorion's Ward // Candlekeep Sage
0.5%inclusion20 decks4.39K decks
Yorion, Sky Nomad
0.6%inclusion16 decks2.50K decks
Lagrella, the Magpie
0.7%inclusion13 decks1.92K decks
The Wandering Minstrel
0.1%inclusion10 decks15.2K decks
Reaper King
0.1%inclusion9 decks8.30K decks
Aminatou, the Fateshifter
0.1%inclusion8 decks6.62K decks
Sharuum the Hegemon
0.3%inclusion8 decks2.92K decks
Hashaton, Scarab's Fist
0.0%inclusion8 decks22.5K decks
Helga, Skittish Seer
0.0%inclusion7 decks17.3K decks
Jodah, Archmage Eternal
0.1%inclusion7 decks8.78K decks
Roon of the Hidden Realm
0.2%inclusion6 decks3.32K decks
Bane, Lord of Darkness
0.3%inclusion6 decks2.35K decks
Niko, Light of Hope
0.1%inclusion5 decks8.65K decks
Livio, Oathsworn Sentinel // Sakashima of a Thousand Faces
10%inclusion5 decks49 decks
Sefris of the Hidden Ways
0.0%inclusion5 decks11.3K decks
Sakashima of a Thousand Faces // Yoshimaru, Ever Faithful
1.0%inclusion5 decks523 decks
New Cards
Ennis, Debate Moderator
11%inclusion5 decks45 decks
11%synergy
Skycoach Conductor
3.4%inclusion2 decks59 decks
3%synergy
Paradox Surveyor
1.8%inclusion1 decks55 decks
2%synergy
Continue?
1.7%inclusion6 decks344 decks
0%synergy
Daydream
1.2%inclusion1 decks81 decks
1%synergy
High Synergy Cards
Restoration Angel
88%inclusion883 decks1K decks
86%synergy
Chameleon, Master of Disguise
84%inclusion723 decks859 decks
82%synergy
Starfield Vocalist
83%inclusion725 decks874 decks
80%synergy
Clever Impersonator
81%inclusion813 decks1K decks
79%synergy
Evil Twin
79%inclusion84 decks106 decks
78%synergy
Katara, the Fearless
80%inclusion634 decks792 decks
77%synergy
Waxen Shapethief
75%inclusion707 decks945 decks
74%synergy
Naga Fleshcrafter
75%inclusion686 decks918 decks
74%synergy
Vizier of Many Faces
74%inclusion743 decks1K decks
73%synergy
Altered Ego
75%inclusion618 decks828 decks
73%synergy
Top Cards
Phyrexian Metamorph
79%inclusion795 decks1K decks
72%synergy
Clone
72%inclusion724 decks1K decks
71%synergy
Stunt Double
72%inclusion722 decks1K decks
71%synergy
Spark Double
70%inclusion701 decks1K decks
64%synergy
Copycrook
68%inclusion680 decks996 decks
68%synergy
Mirrorhall Mimic
68%inclusion682 decks1K decks
67%synergy
Phantasmal Image
68%inclusion677 decks1K decks
65%synergy
Icewind Stalwart
66%inclusion658 decks1K decks
65%synergy
Dack's Duplicate
64%inclusion41 decks64 decks
64%synergy
Visage Bandit
63%inclusion628 decks1K decks
62%synergy
Game Changers
Ancient Tomb
30%inclusion304 decks1K decks
21%synergy
Chrome Mox
28%inclusion276 decks1K decks
22%synergy
Worldly Tutor
25%inclusion203 decks828 decks
13%synergy
Gaea's Cradle
24%inclusion201 decks828 decks
18%synergy
Mana Vault
24%inclusion241 decks1K decks
18%synergy
Mox Diamond
22%inclusion223 decks1K decks
18%synergy
Crop Rotation
22%inclusion180 decks828 decks
12%synergy
Force of Will
19%inclusion189 decks1K decks
9%synergy
Lion's Eye Diamond
15%inclusion155 decks1K decks
14%synergy
Grim Monolith
14%inclusion137 decks1K decks
12%synergy
Creatures
Mirror Image
63%inclusion627 decks1K decks
62%synergy
Callidus Assassin
61%inclusion65 decks106 decks
60%synergy
Sakashima the Impostor
61%inclusion608 decks1K decks
59%synergy
Sakashima of a Thousand Faces
60%inclusion606 decks1K decks
58%synergy
Flesh Duplicate
59%inclusion594 decks1K decks
58%synergy
Birds of Paradise
59%inclusion487 decks828 decks
31%synergy
Glasspool Mimic
58%inclusion579 decks1K decks
55%synergy
Gigantoplasm
55%inclusion549 decks1K decks
55%synergy
Preston, the Vanisher
55%inclusion547 decks1K decks
54%synergy
Avacyn's Pilgrim
54%inclusion447 decks828 decks
42%synergy
Delighted Halfling
50%inclusion414 decks828 decks
38%synergy
Noble Hierarch
50%inclusion414 decks828 decks
34%synergy
Eternal Witness
49%inclusion408 decks828 decks
33%synergy
Roaming Throne
49%inclusion486 decks1K decks
42%synergy
Emiel the Blessed
47%inclusion392 decks828 decks
44%synergy
Metamorphosis Fanatic
47%inclusion43 decks91 decks
46%synergy
Llanowar Elves
46%inclusion381 decks828 decks
26%synergy
Jwari Shapeshifter
46%inclusion457 decks1K decks
45%synergy
Soulherder
44%inclusion439 decks1K decks
39%synergy
Superior Spider-Man
44%inclusion21 decks48 decks
42%synergy
Colossal Grave-Reaver
42%inclusion13 decks31 decks
37%synergy
Sister Hospitaller
39%inclusion41 decks106 decks
38%synergy
Elvish Mystic
39%inclusion320 decks828 decks
23%synergy
Elvish Spirit Guide
38%inclusion312 decks828 decks
34%synergy
Sakashima's Student
38%inclusion376 decks1K decks
37%synergy
Wall of Stolen Identity
37%inclusion370 decks1K decks
36%synergy
Kroxa and Kunoros
36%inclusion17 decks47 decks
36%synergy
Gyruda, Doom of Depths
34%inclusion36 decks106 decks
33%synergy
Ardyn, the Usurper
33%inclusion21 decks63 decks
32%synergy
Charming Prince
32%inclusion323 decks1K decks
30%synergy
Badgermole Cub
28%inclusion222 decks780 decks
24%synergy
Thassa, Deep-Dwelling
27%inclusion273 decks1K decks
25%synergy
Faeburrow Elder
27%inclusion222 decks828 decks
15%synergy
Flickerwisp
26%inclusion263 decks1K decks
25%synergy
Bloom Tender
26%inclusion216 decks828 decks
18%synergy
Mardu Siegebreaker
26%inclusion9 decks35 decks
21%synergy
Fyndhorn Elves
25%inclusion205 decks828 decks
15%synergy
Jackdaw Savior
23%inclusion226 decks985 decks
22%synergy
Ratadrabik of Urborg
23%inclusion24 decks106 decks
20%synergy
Baleful Strix
23%inclusion24 decks106 decks
9%synergy
Supportive Parents
22%inclusion175 decks789 decks
22%synergy
Cloud of Faeries
21%inclusion215 decks1K decks
19%synergy
White Plume Adventurer
21%inclusion207 decks1K decks
20%synergy
Coiling Oracle
20%inclusion167 decks828 decks
15%synergy
Phelia, Exuberant Shepherd
20%inclusion201 decks999 decks
18%synergy
Deadpool, Trading Card
20%inclusion7 decks35 decks
18%synergy
Voice of Victory
20%inclusion182 decks922 decks
13%synergy
Brenard, Ginger Sculptor
20%inclusion163 decks828 decks
19%synergy
Esper Sentinel
19%inclusion193 decks1K decks
0%synergy
Aang, Swift Savior
19%inclusion157 decks828 decks
15%synergy
Instants
Ephemerate
59%inclusion595 decks1K decks
53%synergy
Cloudshift
51%inclusion513 decks1K decks
47%synergy
Essence Flux
47%inclusion469 decks1K decks
44%synergy
Swords to Plowshares
42%inclusion418 decks1K decks
-19%synergy
An Offer You Can't Refuse
29%inclusion293 decks1K decks
4%synergy
Momentary Blink
28%inclusion279 decks1K decks
25%synergy
Path to Exile
27%inclusion275 decks1K decks
-20%synergy
Counterspell
22%inclusion225 decks1K decks
-19%synergy
Chord of Calling
22%inclusion183 decks828 decks
17%synergy
Ghostly Flicker
22%inclusion217 decks1K decks
17%synergy
Swan Song
21%inclusion212 decks1K decks
3%synergy
Enlightened Tutor
20%inclusion205 decks1K decks
5%synergy
Silence
20%inclusion204 decks1K decks
14%synergy
Cabal Ritual
19%inclusion20 decks106 decks
14%synergy
Fierce Guardianship
18%inclusion182 decks1K decks
1%synergy
Pact of Negation
16%inclusion164 decks1K decks
10%synergy
Eerie Interlude
16%inclusion158 decks1K decks
12%synergy
Mindbreak Trap
13%inclusion133 decks1K decks
8%synergy
Drown in the Loch
12%inclusion13 decks106 decks
8%synergy
Dovin's Veto
12%inclusion118 decks1K decks
-7%synergy
Fell the Profane
12%inclusion12 decks102 decks
3%synergy
Flusterstorm
12%inclusion117 decks1K decks
4%synergy
Parting Gust
12%inclusion114 decks986 decks
10%synergy
Arcane Denial
11%inclusion110 decks1K decks
-9%synergy
Heroic Intervention
11%inclusion89 decks828 decks
-20%synergy
Force of Negation
11%inclusion107 decks1K decks
3%synergy
Negate
11%inclusion107 decks1K decks
-10%synergy
Tainted Pact
10%inclusion11 decks106 decks
7%synergy
Eladamri's Call
9.3%inclusion77 decks828 decks
0%synergy
Beast Within
9.3%inclusion77 decks828 decks
-24%synergy
Flicker of Fate
9.3%inclusion93 decks1K decks
8%synergy
Cyclonic Rift
9.3%inclusion93 decks1K decks
-12%synergy
Mental Misstep
9.1%inclusion91 decks1K decks
3%synergy
Snap
8.9%inclusion89 decks1K decks
1%synergy
Lae'zel's Acrobatics
8.2%inclusion82 decks1K decks
7%synergy
Into the Flood Maw
7.6%inclusion75 decks986 decks
4%synergy
Lim-Dûl's Vault
7.5%inclusion8 decks106 decks
5%synergy
Utter End
7.5%inclusion8 decks106 decks
3%synergy
Despark
7.5%inclusion8 decks106 decks
-6%synergy
Generous Gift
7.4%inclusion74 decks1K decks
-14%synergy
Hide on the Ceiling
7.3%inclusion63 decks858 decks
6%synergy
Sink into Stupor
7.1%inclusion71 decks996 decks
-3%synergy
Brainstorm
7.1%inclusion71 decks1K decks
-11%synergy
Dispel
6.8%inclusion68 decks1K decks
3%synergy
Deadly Rollick
6.6%inclusion7 decks106 decks
-7%synergy
Planar Incision
6.6%inclusion66 decks1K decks
5%synergy
Displace
6.4%inclusion64 decks1K decks
5%synergy
Desperate Ritual
6.3%inclusion4 decks64 decks
3%synergy
Pyretic Ritual
6.3%inclusion4 decks64 decks
3%synergy
Deflecting Swat
6.3%inclusion4 decks64 decks
-11%synergy
Sorceries
Dread Return
48%inclusion51 decks106 decks
43%synergy
Farseek
28%inclusion229 decks828 decks
-8%synergy
Demonic Tutor
25%inclusion27 decks106 decks
6%synergy
Nature's Lore
22%inclusion185 decks828 decks
-9%synergy
Finale of Devastation
21%inclusion173 decks828 decks
13%synergy
Rampant Growth
19%inclusion159 decks828 decks
-14%synergy
Eldritch Evolution
18%inclusion145 decks828 decks
13%synergy
Nature's Rhythm
17%inclusion137 decks806 decks
13%synergy
Avatar's Wrath
16%inclusion135 decks828 decks
12%synergy
Culling Ritual
16%inclusion7 decks43 decks
6%synergy
Three Visits
16%inclusion134 decks828 decks
-8%synergy
Cultivate
14%inclusion120 decks828 decks
-28%synergy
Green Sun's Zenith
13%inclusion106 decks828 decks
8%synergy
Kodama's Reach
12%inclusion102 decks828 decks
-14%synergy
Persist
10%inclusion11 decks106 decks
8%synergy
Damn
10%inclusion11 decks106 decks
-5%synergy
Shared Roots
10%inclusion77 decks772 decks
5%synergy
Splash Portal
7.6%inclusion75 decks985 decks
6%synergy
Diabolic Tutor
6.6%inclusion7 decks106 decks
1%synergy
Diabolic Intent
6.6%inclusion7 decks106 decks
-1%synergy
Neoform
6.2%inclusion51 decks828 decks
3%synergy
Extinction Event
5.7%inclusion6 decks106 decks
5%synergy
Stitch Together
5.7%inclusion6 decks106 decks
4%synergy
Buried Alive
5.7%inclusion6 decks106 decks
0%synergy
Singularity Rupture
5.5%inclusion3 decks55 decks
2%synergy
Utility Artifacts
Panharmonicon
51%inclusion509 decks1K decks
47%synergy
Mirror Box
14%inclusion144 decks1K decks
13%synergy
Conjurer's Closet
13%inclusion132 decks1K decks
11%synergy
Wishclaw Talisman
10%inclusion11 decks106 decks
5%synergy
Altar of the Brood
6.4%inclusion64 decks1K decks
5%synergy
The One Ring
5.7%inclusion57 decks1K decks
-3%synergy
Swiftfoot Boots
5.2%inclusion52 decks1K decks
-22%synergy
Enchantments
Wild Growth
36%inclusion294 decks828 decks
25%synergy
Airbender Ascension
30%inclusion254 decks833 decks
28%synergy
Animate Dead
25%inclusion27 decks106 decks
17%synergy
Food Chain
25%inclusion205 decks828 decks
23%synergy
Heartless Summoning
22%inclusion23 decks106 decks
21%synergy
Mystic Remora
21%inclusion211 decks1K decks
5%synergy
Utopia Sprawl
21%inclusion172 decks828 decks
13%synergy
Touch the Spirit Realm
20%inclusion198 decks1K decks
18%synergy
Rhystic Study
18%inclusion180 decks1K decks
-5%synergy
Teleportation Circle
16%inclusion156 decks1K decks
12%synergy
Smothering Tithe
14%inclusion145 decks1K decks
-6%synergy
Dance of the Dead
14%inclusion15 decks106 decks
13%synergy
Elemental Bond
14%inclusion112 decks828 decks
8%synergy
Sneak Attack
13%inclusion8 decks64 decks
10%synergy
Deafening Silence
11%inclusion110 decks1K decks
9%synergy
Virtue of Knowledge
10%inclusion96 decks1K decks
8%synergy
Carpet of Flowers
10%inclusion79 decks828 decks
7%synergy
Annie Joins Up
10%inclusion4 decks42 decks
-3%synergy
Impact Tremors
9.4%inclusion6 decks64 decks
0%synergy
Birthing Ritual
8.7%inclusion72 decks824 decks
8%synergy
Cream of the Crop
8.2%inclusion68 decks828 decks
8%synergy
Mortuary
6.6%inclusion7 decks106 decks
6%synergy
Mirror March
6.3%inclusion4 decks64 decks
5%synergy
Molten Echoes
6.3%inclusion4 decks64 decks
5%synergy
Underworld Breach
6.3%inclusion4 decks64 decks
0%synergy
Sylvan Library
5.6%inclusion46 decks828 decks
-3%synergy
Planeswalkers
Saheeli Rai
6.3%inclusion4 decks64 decks
5%synergy
Utility Lands
Boseiju, Who Endures
36%inclusion297 decks828 decks
17%synergy
Otawara, Soaring City
30%inclusion299 decks1K decks
14%synergy
City of Traitors
15%inclusion148 decks1K decks
14%synergy
Reliquary Tower
14%inclusion145 decks1K decks
-15%synergy
Yavimaya, Cradle of Growth
12%inclusion123 decks1K decks
4%synergy
Takenuma, Abandoned Mire
11%inclusion12 decks106 decks
3%synergy
Crystal Vein
11%inclusion109 decks1K decks
10%synergy
Bojuka Bog
10%inclusion11 decks106 decks
-19%synergy
Cephalid Coliseum
9.5%inclusion95 decks1K decks
6%synergy
Mistrise Village
9.0%inclusion83 decks920 decks
1%synergy
Peat Bog
7.5%inclusion8 decks106 decks
7%synergy
Witch's Cottage
7.5%inclusion8 decks106 decks
4%synergy
Alchemist's Refuge
6.5%inclusion54 decks828 decks
1%synergy
Great Hall of the Citadel
6.1%inclusion61 decks1K decks
5%synergy
Urza's Saga
6.1%inclusion61 decks1K decks
-1%synergy
Dryad Arbor
5.7%inclusion47 decks828 decks
2%synergy
Phyrexian Tower
5.7%inclusion6 decks106 decks
-3%synergy
Shifting Woodland
5.3%inclusion44 decks824 decks
-2%synergy
Abandoned Air Temple
5.3%inclusion43 decks816 decks
0%synergy
Mana Artifacts
Sol Ring
81%inclusion812 decks1K decks
-3%synergy
Arcane Signet
77%inclusion768 decks1K decks
5%synergy
Talisman of Dominance
52%inclusion55 decks106 decks
20%synergy
Talisman of Hierarchy
40%inclusion42 decks106 decks
13%synergy
Fellwar Stone
37%inclusion368 decks1K decks
16%synergy
Lotus Petal
31%inclusion306 decks1K decks
24%synergy
Orzhov Signet
30%inclusion32 decks106 decks
7%synergy
Dimir Signet
30%inclusion32 decks106 decks
6%synergy
Talisman of Progress
28%inclusion281 decks1K decks
3%synergy
Talisman of Curiosity
27%inclusion223 decks828 decks
14%synergy
Talisman of Creativity
25%inclusion16 decks64 decks
-3%synergy
Talisman of Unity
20%inclusion166 decks828 decks
13%synergy
Izzet Signet
17%inclusion11 decks64 decks
-6%synergy
Talisman of Indulgence
17%inclusion8 decks47 decks
-10%synergy
Talisman of Resilience
16%inclusion7 decks43 decks
4%synergy
Relic of Legends
15%inclusion152 decks1K decks
13%synergy
Talisman of Conviction
14%inclusion9 decks64 decks
-10%synergy
Azorius Signet
14%inclusion138 decks1K decks
-7%synergy
Boros Signet
11%inclusion7 decks64 decks
-8%synergy
Pentad Prism
8.3%inclusion83 decks1K decks
8%synergy
Cursed Mirror
7.8%inclusion5 decks64 decks
2%synergy
Thought Vessel
7.0%inclusion70 decks1K decks
-10%synergy
Mind Stone
6.9%inclusion69 decks1K decks
-7%synergy
Relic of Sauron
6.4%inclusion3 decks47 decks
-1%synergy
Charcoal Diamond
5.7%inclusion6 decks106 decks
2%synergy
Simic Signet
5.4%inclusion45 decks828 decks
-5%synergy
Bender's Waterskin
5.2%inclusion45 decks863 decks
2%synergy
Mox Amber
5.1%inclusion51 decks1K decks
1%synergy
Lands
Command Tower
93%inclusion932 decks1K decks
19%synergy
Breeding Pool
60%inclusion497 decks828 decks
18%synergy
Temple Garden
56%inclusion464 decks828 decks
17%synergy
Exotic Orchard
55%inclusion553 decks1K decks
19%synergy
Hallowed Fountain
53%inclusion530 decks1K decks
13%synergy
Flooded Strand
52%inclusion518 decks1K decks
40%synergy
Windswept Heath
48%inclusion476 decks1K decks
36%synergy
Misty Rainforest
47%inclusion474 decks1K decks
36%synergy
Watery Grave
46%inclusion49 decks106 decks
5%synergy
Godless Shrine
39%inclusion41 decks106 decks
-3%synergy
Tropical Island
39%inclusion319 decks828 decks
24%synergy
Overgrown Tomb
37%inclusion16 decks43 decks
-4%synergy
Savannah
37%inclusion308 decks828 decks
24%synergy
Yavimaya Coast
36%inclusion299 decks828 decks
9%synergy
Hinterland Harbor
35%inclusion291 decks828 decks
2%synergy
Glacial Fortress
35%inclusion347 decks1K decks
2%synergy
Tundra
33%inclusion335 decks1K decks
20%synergy
Polluted Delta
33%inclusion329 decks1K decks
21%synergy
City of Brass
33%inclusion327 decks1K decks
25%synergy
Badlands
32%inclusion15 decks47 decks
19%synergy
Adarkar Wastes
32%inclusion318 decks1K decks
8%synergy
Raffine's Tower
31%inclusion33 decks106 decks
7%synergy
Prairie Stream
31%inclusion308 decks1K decks
-2%synergy
Brushland
31%inclusion254 decks828 decks
11%synergy
Wooded Foothills
31%inclusion307 decks1K decks
20%synergy
Scalding Tarn
30%inclusion304 decks1K decks
20%synergy
Bayou
30%inclusion13 decks43 decks
17%synergy
Mana Confluence
30%inclusion302 decks1K decks
23%synergy
Rejuvenating Springs
30%inclusion245 decks828 decks
4%synergy
Cavern of Souls
29%inclusion295 decks1K decks
22%synergy
Gemstone Caverns
29%inclusion290 decks1K decks
24%synergy
Verdant Catacombs
29%inclusion288 decks1K decks
18%synergy
Volcanic Island
28%inclusion18 decks64 decks
14%synergy
Zagoth Triome
28%inclusion12 decks43 decks
1%synergy
Canopy Vista
28%inclusion231 decks828 decks
-8%synergy
Sunpetal Grove
27%inclusion227 decks828 decks
-1%synergy
Marsh Flats
27%inclusion271 decks1K decks
16%synergy
Steam Vents
27%inclusion17 decks64 decks
-12%synergy
Sea of Clouds
27%inclusion266 decks1K decks
3%synergy
Underground Sea
26%inclusion28 decks106 decks
12%synergy
Arcane Sanctum
26%inclusion28 decks106 decks
-1%synergy
Spara's Headquarters
26%inclusion218 decks828 decks
-1%synergy
Undercity Sewers
25%inclusion27 decks106 decks
14%synergy
Dreamroot Cascade
25%inclusion205 decks828 decks
3%synergy
Sunken Hollow
24%inclusion25 decks106 decks
-10%synergy
Bountiful Promenade
23%inclusion194 decks828 decks
2%synergy
Arid Mesa
23%inclusion232 decks1K decks
13%synergy
Scrubland
23%inclusion24 decks106 decks
9%synergy
Shadowy Backstreet
22%inclusion23 decks106 decks
11%synergy
Taiga
21%inclusion9 decks42 decks
9%synergy