Tainted Observer
Ashnod's Altar
Scurry Oak

   Prerequisites

What do I need to start this combo?
All permanents on the battlefield.
You have a way to cause a creature to enter the battlefield under your control. Scurry Oak has at least one +1/+1 counter on it.

   Steps

How does this combo work?
1
Cause a creature to enter the battlefield under your control.
2
When the creature enters the battlefield, Tainted Observer triggers.
3
Holding priority, activate Ashnod's Altar by sacrificing the creature, adding .
4
Resolve the Tainted Observer trigger, causing you to pay 2 to put a +1/+1 counter on Scurry Oak.
5
Scurry Oak triggers, creating a 1/1 Squirrel creature token.
6
Repeat from step 2.

   Results

What do I get from this combo?
Infinite +1/+1 counters on a creature
Infinite death triggers
Infinite ETB
Infinite LTB
Infinite proliferate
Infinite sacrifice triggers
Xavier Sal, Infested Captain
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Atraxa, Praetors' Voice
0.0%inclusion3 decks39.5K decks
The Wise Mothman
0.0%inclusion2 decks30.1K decks
Ezuri, Stalker of Spheres
0.1%inclusion2 decks2.05K decks
Falco Spara, Pactweaver
0.0%inclusion1 decks4.51K decks
Kianne, Corrupted Memory
0.1%inclusion1 decks802 decks
Glarb, Calamity's Augur
0.0%inclusion1 decks19.9K decks
Sab-Sunen, Luxa Embodied
0.0%inclusion1 decks3.30K decks
Ezuri, Claw of Progress
0.0%inclusion1 decks7.13K decks
Roalesk, Apex Hybrid
0.2%inclusion1 decks517 decks
High Synergy Cards
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55%synergy
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59%inclusion13 decks22 decks
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59%inclusion13 decks22 decks
53%synergy
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55%inclusion12 decks22 decks
52%synergy
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55%inclusion12 decks22 decks
51%synergy
Gyre Sage
45%inclusion10 decks22 decks
42%synergy
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41%synergy
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43%inclusion9 decks21 decks
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Top Cards
Doubling Season
45%inclusion10 decks22 decks
36%synergy
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43%inclusion9 decks21 decks
39%synergy
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Mutational Advantage
41%inclusion9 decks22 decks
37%synergy
Counterspell
41%inclusion9 decks22 decks
-1%synergy
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40%inclusion6 decks15 decks
37%synergy
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36%inclusion8 decks22 decks
35%synergy
Unnatural Restoration
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34%synergy
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33%synergy
Inspiring Call
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Game Changers
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5%synergy
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25%synergy
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32%inclusion7 decks22 decks
30%synergy
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29%synergy
Master Biomancer
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25%synergy
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22%synergy
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21%synergy
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27%inclusion4 decks15 decks
26%synergy
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27%inclusion4 decks15 decks
26%synergy
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27%inclusion4 decks15 decks
26%synergy
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26%synergy
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27%inclusion4 decks15 decks
23%synergy
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27%inclusion4 decks15 decks
17%synergy
Herd Baloth
23%inclusion5 decks22 decks
22%synergy
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23%inclusion5 decks22 decks
21%synergy
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21%synergy
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20%synergy
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20%inclusion3 decks15 decks
20%synergy
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20%inclusion3 decks15 decks
19%synergy
Tender Wildguide
20%inclusion4 decks20 decks
19%synergy
The Mycotyrant
20%inclusion3 decks15 decks
19%synergy
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20%inclusion3 decks15 decks
19%synergy
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20%inclusion3 decks15 decks
19%synergy
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20%inclusion3 decks15 decks
12%synergy
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18%inclusion4 decks22 decks
18%synergy
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18%synergy
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17%synergy
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18%inclusion4 decks22 decks
16%synergy
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12%synergy
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14%synergy
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13%synergy
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13%synergy
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14%inclusion3 decks22 decks
13%synergy
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13%synergy
Gruff Triplets
14%inclusion3 decks22 decks
13%synergy
Danny Pink
14%inclusion3 decks22 decks
12%synergy
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11%synergy
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10%synergy
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9%synergy
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8%synergy
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7%synergy
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4%synergy
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-14%synergy
Instants
Experimental Augury
27%inclusion6 decks22 decks
25%synergy
Ripples of Potential
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24%synergy
Atomize
27%inclusion4 decks15 decks
23%synergy
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27%inclusion4 decks15 decks
18%synergy
Vraska's Fall
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19%synergy
Assassin's Trophy
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-11%synergy
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17%synergy
Serum Snare
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17%synergy
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17%synergy
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16%synergy
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4%synergy
Radstorm
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12%synergy
Obscuring Haze
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11%synergy
An Offer You Can't Refuse
14%inclusion3 decks22 decks
-11%synergy
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Sorceries
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32%synergy
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-20%synergy
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19%synergy
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-18%synergy
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13%synergy
Smell Fear
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13%synergy
Irenicus's Vile Duplication
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10%synergy
Kodama's Reach
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-13%synergy
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-19%synergy
Utility Artifacts
Animation Module
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31%synergy
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22%synergy
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21%synergy
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19%synergy
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20%synergy
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18%synergy
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17%synergy
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16%synergy
Skullclamp
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7%synergy
Magistrate's Scepter
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13%synergy
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13%synergy
Thornbite Staff
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13%synergy
Ichormoon Gauntlet
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12%synergy
Thousand-Year Elixir
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12%synergy
Enchantments
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30%synergy
Simic Ascendancy
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17%synergy
Necrosynthesis
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20%synergy
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16%synergy
Freed from the Real
18%inclusion4 decks22 decks
16%synergy
Tribute to the World Tree
18%inclusion4 decks22 decks
13%synergy
Hardened Scales
18%inclusion4 decks22 decks
8%synergy
Gutter Grime
14%inclusion3 decks22 decks
13%synergy
Greater Good
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9%synergy
Branching Evolution
14%inclusion3 decks22 decks
7%synergy
Planeswalkers
Garruk, Cursed Huntsman
27%inclusion4 decks15 decks
25%synergy
Vraska, Betrayal's Sting
27%inclusion4 decks15 decks
24%synergy
Vraska, Golgari Queen
20%inclusion3 decks15 decks
18%synergy
Nissa, Voice of Zendikar
18%inclusion4 decks22 decks
17%synergy
Tamiyo, Collector of Tales
14%inclusion3 decks22 decks
13%synergy
Utility Lands
Nesting Grounds
36%inclusion8 decks22 decks
34%synergy
Reliquary Tower
27%inclusion6 decks22 decks
-3%synergy
Hickory Woodlot
23%inclusion5 decks22 decks
22%synergy
Llanowar Reborn
23%inclusion5 decks22 decks
21%synergy
Rogue's Passage
23%inclusion5 decks22 decks
3%synergy
Peat Bog
20%inclusion3 decks15 decks
20%synergy
Saprazzan Skerry
18%inclusion4 decks22 decks
18%synergy
Minamo, School at Water's Edge
18%inclusion4 decks22 decks
14%synergy
Alchemist's Refuge
18%inclusion4 decks22 decks
12%synergy
Yavimaya, Cradle of Growth
18%inclusion4 decks22 decks
9%synergy
Mage-Ring Network
14%inclusion3 decks22 decks
13%synergy
Diamond City
14%inclusion3 decks22 decks
13%synergy
Tyrite Sanctum
14%inclusion3 decks22 decks
12%synergy
Oran-Rief, the Vastwood
14%inclusion3 decks22 decks
10%synergy
Mosswort Bridge
14%inclusion3 decks22 decks
3%synergy
Mana Artifacts
Sol Ring
64%inclusion14 decks22 decks
-20%synergy
Arcane Signet
55%inclusion12 decks22 decks
-18%synergy
Astral Cornucopia
50%inclusion11 decks22 decks
49%synergy
Everflowing Chalice
45%inclusion10 decks22 decks
41%synergy
Staff of Compleation
27%inclusion6 decks22 decks
26%synergy
Aetheric Amplifier
25%inclusion3 decks12 decks
24%synergy
Pentad Prism
23%inclusion5 decks22 decks
22%synergy
Simic Signet
18%inclusion4 decks22 decks
7%synergy
Glistening Sphere
14%inclusion3 decks22 decks
13%synergy
Lands
Command Tower
73%inclusion16 decks22 decks
-2%synergy
Undergrowth Stadium
60%inclusion9 decks15 decks
37%synergy
Zagoth Triome
60%inclusion9 decks15 decks
33%synergy
Exotic Orchard
55%inclusion12 decks22 decks
18%synergy
Rejuvenating Springs
50%inclusion11 decks22 decks
24%synergy
Breeding Pool
50%inclusion11 decks22 decks
8%synergy
Watery Grave
47%inclusion7 decks15 decks
5%synergy
Yavimaya Coast
41%inclusion9 decks22 decks
14%synergy
Morphic Pool
40%inclusion6 decks15 decks
16%synergy
Woodland Cemetery
40%inclusion6 decks15 decks
8%synergy
Overgrown Tomb
40%inclusion6 decks15 decks
-1%synergy
Misty Rainforest
36%inclusion8 decks22 decks
25%synergy
Hinterland Harbor
36%inclusion8 decks22 decks
3%synergy
Undercity Sewers
33%inclusion5 decks15 decks
22%synergy
Verdant Catacombs
27%inclusion6 decks22 decks
16%synergy
Hedge Maze
27%inclusion6 decks22 decks
16%synergy
Dreamroot Cascade
27%inclusion6 decks22 decks
6%synergy
Underground Mortuary
27%inclusion4 decks15 decks
14%synergy
Llanowar Wastes
27%inclusion4 decks15 decks
0%synergy
Sunken Hollow
27%inclusion4 decks15 decks
-7%synergy
Brokers Hideout
23%inclusion5 decks22 decks
21%synergy
Barkchannel Pathway
23%inclusion5 decks22 decks
16%synergy
Simic Growth Chamber
23%inclusion5 decks22 decks
6%synergy
Blooming Marsh
20%inclusion3 decks15 decks
15%synergy
Golgari Rot Farm
20%inclusion3 decks15 decks
3%synergy
Shipwreck Marsh
20%inclusion3 decks15 decks
2%synergy
Opulent Palace
20%inclusion3 decks15 decks
-8%synergy
Drowned Catacomb
20%inclusion3 decks15 decks
-9%synergy
Polluted Delta
18%inclusion4 decks22 decks
6%synergy
Flooded Grove
18%inclusion4 decks22 decks
3%synergy
Evolving Wilds
18%inclusion4 decks22 decks
-3%synergy
Waterlogged Grove
14%inclusion3 decks22 decks
7%synergy
Thornwood Falls
14%inclusion3 decks22 decks
7%synergy
Overflowing Basin
14%inclusion3 decks22 decks
5%synergy
Terramorphic Expanse
14%inclusion3 decks22 decks
-1%synergy
Temple of Mystery
14%inclusion3 decks22 decks
-3%synergy