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
14%inclusion579 decks4.18K decks
Brago, King Eternal
0.2%inclusion24 decks12.6K decks
Abdel Adrian, Gorion's Ward // Candlekeep Sage
0.5%inclusion21 decks4.36K decks
Yorion, Sky Nomad
0.7%inclusion18 decks2.44K decks
Lagrella, the Magpie
0.6%inclusion12 decks1.86K decks
Sharuum the Hegemon
0.4%inclusion10 decks2.84K decks
Reaper King
0.1%inclusion9 decks8.03K decks
Aminatou, the Fateshifter
0.1%inclusion9 decks6.56K decks
The Wandering Minstrel
0.1%inclusion9 decks13.8K decks
Hashaton, Scarab's Fist
0.0%inclusion8 decks21.5K decks
Helga, Skittish Seer
0.0%inclusion7 decks16.1K decks
Jodah, Archmage Eternal
0.1%inclusion7 decks8.53K decks
Bane, Lord of Darkness
0.3%inclusion6 decks2.33K decks
Niko, Light of Hope
0.1%inclusion5 decks8.17K decks
Livio, Oathsworn Sentinel // Sakashima of a Thousand Faces
11%inclusion5 decks47 decks
Sefris of the Hidden Ways
0.0%inclusion5 decks10.9K decks
Sakashima of a Thousand Faces // Yoshimaru, Ever Faithful
1.0%inclusion5 decks498 decks
Zinnia, Valley's Voice
0.0%inclusion4 decks16.1K decks
New Cards
Bloodline Bidding
17%inclusion1 decks6 decks
14%synergy
Sodden Verdure
3.8%inclusion10 decks260 decks
-3%synergy
Omni-Changeling
2.8%inclusion8 decks281 decks
2%synergy
Personify
2.8%inclusion8 decks285 decks
2%synergy
Formidable Speaker
2.3%inclusion14 decks608 decks
-1%synergy
High Synergy Cards
Restoration Angel
86%inclusion723 decks836 decks
84%synergy
Chameleon, Master of Disguise
82%inclusion555 decks679 decks
79%synergy
Starfield Vocalist
80%inclusion553 decks694 decks
77%synergy
Clever Impersonator
79%inclusion659 decks836 decks
76%synergy
Katara, the Fearless
80%inclusion493 decks619 decks
76%synergy
Evil Twin
77%inclusion83 decks108 decks
76%synergy
Waxen Shapethief
72%inclusion551 decks765 decks
71%synergy
Naga Fleshcrafter
72%inclusion533 decks738 decks
71%synergy
Altered Ego
72%inclusion474 decks656 decks
71%synergy
Vizier of Many Faces
72%inclusion598 decks836 decks
71%synergy
Top Cards
Phyrexian Metamorph
76%inclusion636 decks836 decks
69%synergy
Stunt Double
70%inclusion587 decks836 decks
69%synergy
Clone
69%inclusion577 decks836 decks
68%synergy
Spark Double
67%inclusion556 decks836 decks
60%synergy
Mirrorhall Mimic
66%inclusion553 decks836 decks
65%synergy
Copycrook
65%inclusion532 decks816 decks
65%synergy
Phantasmal Image
64%inclusion534 decks836 decks
61%synergy
Dack's Duplicate
62%inclusion38 decks61 decks
62%synergy
Icewind Stalwart
61%inclusion508 decks836 decks
61%synergy
Visage Bandit
59%inclusion486 decks828 decks
58%synergy
Game Changers
Ancient Tomb
28%inclusion233 decks836 decks
18%synergy
Gaea's Cradle
25%inclusion164 decks656 decks
19%synergy
Worldly Tutor
25%inclusion163 decks656 decks
13%synergy
Chrome Mox
24%inclusion202 decks836 decks
18%synergy
Mana Vault
21%inclusion175 decks836 decks
15%synergy
Mox Diamond
20%inclusion166 decks836 decks
16%synergy
Crop Rotation
20%inclusion128 decks656 decks
10%synergy
Force of Will
19%inclusion158 decks836 decks
9%synergy
Lion's Eye Diamond
13%inclusion109 decks836 decks
11%synergy
Grim Monolith
11%inclusion94 decks836 decks
9%synergy
Creatures
Callidus Assassin
58%inclusion63 decks108 decks
57%synergy
Sakashima the Impostor
58%inclusion485 decks836 decks
56%synergy
Birds of Paradise
58%inclusion379 decks656 decks
30%synergy
Mirror Image
57%inclusion479 decks836 decks
57%synergy
Sakashima of a Thousand Faces
57%inclusion477 decks836 decks
54%synergy
Flesh Duplicate
56%inclusion469 decks836 decks
55%synergy
Avacyn's Pilgrim
55%inclusion359 decks656 decks
42%synergy
Glasspool Mimic
54%inclusion448 decks836 decks
51%synergy
Gigantoplasm
52%inclusion433 decks836 decks
52%synergy
Noble Hierarch
51%inclusion333 decks656 decks
35%synergy
Preston, the Vanisher
51%inclusion424 decks836 decks
50%synergy
Eternal Witness
50%inclusion331 decks656 decks
34%synergy
Emiel the Blessed
50%inclusion330 decks656 decks
47%synergy
Delighted Halfling
48%inclusion314 decks656 decks
36%synergy
Llanowar Elves
46%inclusion304 decks656 decks
26%synergy
Metamorphosis Fanatic
46%inclusion40 decks87 decks
45%synergy
Roaming Throne
44%inclusion365 decks836 decks
37%synergy
Superior Spider-Man
43%inclusion19 decks44 decks
42%synergy
Soulherder
43%inclusion356 decks836 decks
38%synergy
Jwari Shapeshifter
41%inclusion341 decks836 decks
41%synergy
Colossal Grave-Reaver
40%inclusion12 decks30 decks
35%synergy
Sister Hospitaller
39%inclusion42 decks108 decks
38%synergy
Elvish Mystic
38%inclusion251 decks656 decks
22%synergy
Kroxa and Kunoros
38%inclusion17 decks45 decks
37%synergy
Wall of Stolen Identity
37%inclusion306 decks836 decks
36%synergy
Ardyn, the Usurper
36%inclusion21 decks59 decks
35%synergy
Sakashima's Student
35%inclusion291 decks836 decks
34%synergy
Elvish Spirit Guide
34%inclusion223 decks656 decks
30%synergy
Charming Prince
30%inclusion252 decks836 decks
28%synergy
Gyruda, Doom of Depths
29%inclusion31 decks108 decks
27%synergy
Faeburrow Elder
28%inclusion183 decks656 decks
16%synergy
Badgermole Cub
28%inclusion168 decks606 decks
23%synergy
Mardu Siegebreaker
27%inclusion9 decks33 decks
22%synergy
Bloom Tender
26%inclusion169 decks656 decks
18%synergy
Fyndhorn Elves
25%inclusion167 decks656 decks
16%synergy
Thassa, Deep-Dwelling
25%inclusion210 decks836 decks
23%synergy
Baleful Strix
25%inclusion27 decks108 decks
12%synergy
Flickerwisp
24%inclusion204 decks836 decks
23%synergy
Ratadrabik of Urborg
22%inclusion24 decks108 decks
20%synergy
Cloud of Faeries
22%inclusion184 decks836 decks
20%synergy
Coiling Oracle
21%inclusion135 decks656 decks
15%synergy
Jackdaw Savior
20%inclusion158 decks805 decks
19%synergy
Voice of Victory
19%inclusion143 decks742 decks
13%synergy
Displacer Kitten
19%inclusion159 decks836 decks
14%synergy
Esper Sentinel
19%inclusion159 decks836 decks
0%synergy
Grand Abolisher
19%inclusion155 decks836 decks
9%synergy
Supportive Parents
19%inclusion114 decks616 decks
18%synergy
Aang, Swift Savior
18%inclusion118 decks646 decks
14%synergy
Deadpool, Trading Card
18%inclusion6 decks33 decks
16%synergy
Anger
18%inclusion11 decks61 decks
12%synergy
Instants
Ephemerate
58%inclusion485 decks836 decks
52%synergy
Cloudshift
51%inclusion423 decks836 decks
47%synergy
Essence Flux
47%inclusion389 decks836 decks
43%synergy
Swords to Plowshares
41%inclusion345 decks836 decks
-20%synergy
Momentary Blink
30%inclusion248 decks836 decks
27%synergy
An Offer You Can't Refuse
28%inclusion236 decks836 decks
4%synergy
Path to Exile
27%inclusion225 decks836 decks
-20%synergy
Chord of Calling
25%inclusion164 decks656 decks
20%synergy
Ghostly Flicker
23%inclusion195 decks836 decks
19%synergy
Counterspell
22%inclusion187 decks836 decks
-19%synergy
Swan Song
20%inclusion171 decks836 decks
3%synergy
Silence
19%inclusion159 decks836 decks
13%synergy
Cabal Ritual
19%inclusion20 decks108 decks
13%synergy
Eerie Interlude
18%inclusion147 decks836 decks
14%synergy
Enlightened Tutor
17%inclusion146 decks836 decks
2%synergy
Fierce Guardianship
17%inclusion139 decks836 decks
-1%synergy
Pact of Negation
16%inclusion136 decks836 decks
10%synergy
Mindbreak Trap
13%inclusion111 decks836 decks
8%synergy
Drown in the Loch
13%inclusion14 decks108 decks
8%synergy
Dovin's Veto
13%inclusion106 decks836 decks
-6%synergy
Arcane Denial
12%inclusion100 decks836 decks
-8%synergy
Negate
12%inclusion100 decks836 decks
-9%synergy
Parting Gust
11%inclusion91 decks806 decks
9%synergy
Flusterstorm
11%inclusion94 decks836 decks
4%synergy
Fell the Profane
11%inclusion11 decks98 decks
2%synergy
Heroic Intervention
11%inclusion72 decks656 decks
-19%synergy
Tainted Pact
10%inclusion11 decks108 decks
7%synergy
Flicker of Fate
10%inclusion82 decks836 decks
8%synergy
Eladamri's Call
10%inclusion64 decks656 decks
1%synergy
Cyclonic Rift
10%inclusion81 decks836 decks
-12%synergy
Lae'zel's Acrobatics
10%inclusion80 decks836 decks
8%synergy
Force of Negation
9.4%inclusion79 decks836 decks
1%synergy
Despark
9.3%inclusion10 decks108 decks
-4%synergy
Beast Within
9.1%inclusion60 decks656 decks
-25%synergy
Mental Misstep
8.6%inclusion72 decks836 decks
3%synergy
Utter End
8.3%inclusion9 decks108 decks
4%synergy
Generous Gift
8.1%inclusion68 decks836 decks
-14%synergy
Snap
8.0%inclusion67 decks836 decks
0%synergy
Hide on the Ceiling
7.8%inclusion53 decks678 decks
7%synergy
Lim-Dûl's Vault
7.4%inclusion8 decks108 decks
4%synergy
Planar Incision
7.3%inclusion61 decks836 decks
6%synergy
Semester's End
7.3%inclusion61 decks836 decks
6%synergy
Displace
7.2%inclusion60 decks836 decks
6%synergy
Mana Drain
6.9%inclusion58 decks836 decks
-8%synergy
Sink into Stupor
6.6%inclusion54 decks816 decks
-3%synergy
Dispel
6.6%inclusion55 decks836 decks
3%synergy
Brainstorm
6.6%inclusion55 decks836 decks
-12%synergy
Into the Flood Maw
6.6%inclusion53 decks806 decks
3%synergy
Desperate Ritual
6.6%inclusion4 decks61 decks
4%synergy
Pyretic Ritual
6.6%inclusion4 decks61 decks
4%synergy
Sorceries
Dread Return
48%inclusion52 decks108 decks
43%synergy
Farseek
29%inclusion187 decks656 decks
-7%synergy
Demonic Tutor
27%inclusion29 decks108 decks
8%synergy
Nature's Lore
23%inclusion148 decks656 decks
-9%synergy
Finale of Devastation
22%inclusion145 decks656 decks
15%synergy
Eldritch Evolution
19%inclusion124 decks656 decks
15%synergy
Rampant Growth
19%inclusion122 decks656 decks
-14%synergy
Nature's Rhythm
18%inclusion115 decks633 decks
14%synergy
Three Visits
17%inclusion110 decks656 decks
-7%synergy
Avatar's Wrath
17%inclusion108 decks647 decks
13%synergy
Culling Ritual
16%inclusion7 decks43 decks
6%synergy
Cultivate
16%inclusion104 decks656 decks
-27%synergy
Damn
13%inclusion14 decks108 decks
-2%synergy
Kodama's Reach
13%inclusion84 decks656 decks
-14%synergy
Green Sun's Zenith
13%inclusion83 decks656 decks
8%synergy
Persist
11%inclusion12 decks108 decks
9%synergy
Shared Roots
10%inclusion60 decks597 decks
5%synergy
Splash Portal
8.0%inclusion64 decks805 decks
7%synergy
Neoform
6.9%inclusion45 decks656 decks
3%synergy
Diabolic Tutor
6.5%inclusion7 decks108 decks
1%synergy
Diabolic Intent
6.5%inclusion7 decks108 decks
-1%synergy
Singularity Rupture
5.9%inclusion3 decks51 decks
2%synergy
Stitch Together
5.6%inclusion6 decks108 decks
4%synergy
Wargate
5.3%inclusion35 decks656 decks
3%synergy
Another Round
5.3%inclusion44 decks828 decks
4%synergy
Utility Artifacts
Panharmonicon
51%inclusion426 decks836 decks
47%synergy
Conjurer's Closet
14%inclusion119 decks836 decks
12%synergy
Mirror Box
14%inclusion117 decks836 decks
13%synergy
Wishclaw Talisman
10%inclusion11 decks108 decks
5%synergy
Altar of the Brood
6.3%inclusion53 decks836 decks
5%synergy
The One Ring
5.6%inclusion47 decks836 decks
-3%synergy
Swiftfoot Boots
5.6%inclusion47 decks836 decks
-22%synergy
Enchantments
Wild Growth
35%inclusion232 decks656 decks
25%synergy
Airbender Ascension
30%inclusion197 decks652 decks
27%synergy
Animate Dead
25%inclusion27 decks108 decks
16%synergy
Food Chain
23%inclusion149 decks656 decks
21%synergy
Utopia Sprawl
23%inclusion148 decks656 decks
15%synergy
Mystic Remora
21%inclusion177 decks836 decks
5%synergy
Heartless Summoning
19%inclusion21 decks108 decks
18%synergy
Rhystic Study
18%inclusion150 decks836 decks
-6%synergy
Touch the Spirit Realm
18%inclusion147 decks836 decks
16%synergy
Teleportation Circle
17%inclusion144 decks836 decks
14%synergy
Smothering Tithe
15%inclusion128 decks836 decks
-6%synergy
Elemental Bond
14%inclusion92 decks656 decks
9%synergy
Sneak Attack
11%inclusion7 decks61 decks
9%synergy
Dance of the Dead
11%inclusion12 decks108 decks
10%synergy
Impact Tremors
10%inclusion6 decks61 decks
0%synergy
Annie Joins Up
10%inclusion4 decks41 decks
-3%synergy
Virtue of Knowledge
9.4%inclusion79 decks836 decks
8%synergy
Deafening Silence
9.2%inclusion77 decks836 decks
7%synergy
Carpet of Flowers
8.7%inclusion57 decks656 decks
6%synergy
Mirror March
6.6%inclusion4 decks61 decks
6%synergy
Molten Echoes
6.6%inclusion4 decks61 decks
5%synergy
Underworld Breach
6.6%inclusion4 decks61 decks
1%synergy
Cream of the Crop
5.9%inclusion39 decks656 decks
6%synergy
Sylvan Library
5.8%inclusion38 decks656 decks
-3%synergy
Mortuary
5.6%inclusion6 decks108 decks
5%synergy
Birthing Ritual
5.5%inclusion36 decks651 decks
5%synergy
Planeswalkers
Saheeli Rai
6.6%inclusion4 decks61 decks
6%synergy
Utility Lands
Boseiju, Who Endures
36%inclusion234 decks656 decks
17%synergy
Otawara, Soaring City
28%inclusion237 decks836 decks
12%synergy
Reliquary Tower
16%inclusion134 decks836 decks
-14%synergy
City of Traitors
13%inclusion108 decks836 decks
12%synergy
Yavimaya, Cradle of Growth
12%inclusion104 decks836 decks
4%synergy
Takenuma, Abandoned Mire
11%inclusion12 decks108 decks
3%synergy
Bojuka Bog
11%inclusion12 decks108 decks
-19%synergy
Mistrise Village
8.6%inclusion64 decks740 decks
1%synergy
Crystal Vein
8.1%inclusion68 decks836 decks
7%synergy
Peat Bog
7.4%inclusion8 decks108 decks
7%synergy
Witch's Cottage
7.4%inclusion8 decks108 decks
4%synergy
Alchemist's Refuge
7.3%inclusion48 decks656 decks
1%synergy
Cephalid Coliseum
6.6%inclusion55 decks836 decks
3%synergy
Urza's Saga
6.5%inclusion54 decks836 decks
0%synergy
Dryad Arbor
5.6%inclusion37 decks656 decks
2%synergy
Mortuary Mire
5.6%inclusion6 decks108 decks
1%synergy
Phyrexian Tower
5.6%inclusion6 decks108 decks
-3%synergy
Shifting Woodland
5.5%inclusion36 decks651 decks
-1%synergy
Abandoned Air Temple
5.4%inclusion34 decks634 decks
0%synergy
Mana Artifacts
Sol Ring
79%inclusion660 decks836 decks
-5%synergy
Arcane Signet
78%inclusion653 decks836 decks
6%synergy
Talisman of Dominance
54%inclusion58 decks108 decks
21%synergy
Talisman of Hierarchy
42%inclusion45 decks108 decks
15%synergy
Fellwar Stone
36%inclusion304 decks836 decks
16%synergy
Talisman of Progress
30%inclusion251 decks836 decks
5%synergy
Dimir Signet
30%inclusion32 decks108 decks
5%synergy
Orzhov Signet
29%inclusion31 decks108 decks
6%synergy
Talisman of Curiosity
27%inclusion180 decks656 decks
15%synergy
Lotus Petal
27%inclusion226 decks836 decks
20%synergy
Talisman of Creativity
25%inclusion15 decks61 decks
-3%synergy
Talisman of Unity
22%inclusion143 decks656 decks
14%synergy
Izzet Signet
18%inclusion11 decks61 decks
-6%synergy
Talisman of Indulgence
18%inclusion8 decks45 decks
-10%synergy
Talisman of Resilience
16%inclusion7 decks43 decks
4%synergy
Azorius Signet
16%inclusion132 decks836 decks
-5%synergy
Talisman of Conviction
13%inclusion8 decks61 decks
-11%synergy
Relic of Legends
13%inclusion109 decks836 decks
11%synergy
Boros Signet
11%inclusion7 decks61 decks
-8%synergy
Mind Stone
8.5%inclusion71 decks836 decks
-6%synergy
Thought Vessel
8.0%inclusion67 decks836 decks
-9%synergy
Relic of Sauron
6.7%inclusion3 decks45 decks
-1%synergy
Cursed Mirror
6.6%inclusion4 decks61 decks
1%synergy
Simic Signet
6.4%inclusion42 decks656 decks
-5%synergy
Pentad Prism
5.9%inclusion49 decks836 decks
6%synergy
Charcoal Diamond
5.6%inclusion6 decks108 decks
1%synergy
Lands
Command Tower
93%inclusion775 decks836 decks
18%synergy
Breeding Pool
61%inclusion399 decks656 decks
19%synergy
Temple Garden
56%inclusion367 decks656 decks
17%synergy
Exotic Orchard
55%inclusion462 decks836 decks
19%synergy
Hallowed Fountain
52%inclusion432 decks836 decks
12%synergy
Flooded Strand
49%inclusion412 decks836 decks
38%synergy
Windswept Heath
45%inclusion374 decks836 decks
34%synergy
Watery Grave
44%inclusion48 decks108 decks
3%synergy
Misty Rainforest
44%inclusion366 decks836 decks
32%synergy
Godless Shrine
39%inclusion42 decks108 decks
-2%synergy
Overgrown Tomb
37%inclusion16 decks43 decks
-4%synergy
Tropical Island
37%inclusion244 decks656 decks
23%synergy
Yavimaya Coast
36%inclusion236 decks656 decks
9%synergy
Hinterland Harbor
36%inclusion235 decks656 decks
3%synergy
Savannah
36%inclusion234 decks656 decks
23%synergy
Glacial Fortress
35%inclusion290 decks836 decks
2%synergy
Polluted Delta
33%inclusion272 decks836 decks
20%synergy
Raffine's Tower
32%inclusion35 decks108 decks
8%synergy
Prairie Stream
32%inclusion268 decks836 decks
-1%synergy
Rejuvenating Springs
31%inclusion206 decks656 decks
5%synergy
Tundra
31%inclusion262 decks836 decks
17%synergy
Badlands
31%inclusion14 decks45 decks
18%synergy
Adarkar Wastes
31%inclusion259 decks836 decks
7%synergy
City of Brass
31%inclusion256 decks836 decks
23%synergy
Bayou
30%inclusion13 decks43 decks
17%synergy
Brushland
30%inclusion197 decks656 decks
10%synergy
Mana Confluence
29%inclusion246 decks836 decks
22%synergy
Scalding Tarn
29%inclusion246 decks836 decks
19%synergy
Spara's Headquarters
29%inclusion188 decks656 decks
1%synergy
Wooded Foothills
29%inclusion239 decks836 decks
18%synergy
Canopy Vista
29%inclusion187 decks656 decks
-7%synergy
Sea of Clouds
28%inclusion237 decks836 decks
4%synergy
Zagoth Triome
28%inclusion12 decks43 decks
0%synergy
Volcanic Island
28%inclusion17 decks61 decks
14%synergy
Arcane Sanctum
28%inclusion30 decks108 decks
0%synergy
Verdant Catacombs
28%inclusion232 decks836 decks
17%synergy
Cavern of Souls
27%inclusion226 decks836 decks
20%synergy
Sunpetal Grove
27%inclusion177 decks656 decks
-1%synergy
Steam Vents
26%inclusion16 decks61 decks
-12%synergy
Gemstone Caverns
26%inclusion218 decks836 decks
21%synergy
Undercity Sewers
26%inclusion28 decks108 decks
15%synergy
Marsh Flats
26%inclusion216 decks836 decks
15%synergy
Underground Sea
25%inclusion27 decks108 decks
10%synergy
Sunken Hollow
25%inclusion27 decks108 decks
-9%synergy
Dreamroot Cascade
25%inclusion162 decks656 decks
3%synergy
Bountiful Promenade
24%inclusion157 decks656 decks
2%synergy
Taiga
22%inclusion9 decks41 decks
9%synergy
Arid Mesa
22%inclusion182 decks836 decks
12%synergy
Shadowy Backstreet
21%inclusion23 decks108 decks
11%synergy
Scrubland
21%inclusion23 decks108 decks
8%synergy