Mikaeus, the Unhallowed + Pith Driller + Bloodflow Connoisseur

Mikaeus, the Unhallowed
Pith Driller
Bloodflow Connoisseur

Requires
Mikaeus, the Unhallowed must be on the battlefield. Pith Driller must be on the battlefield. Bloodflow Connoisseur must be on the battlefield. Pith Driller does not have a +1/+1 counter on it.
Steps
  1. Activate Bloodflow Connoisseur by sacrifiicing Pith Driller.
  2. When Pith Driller dies, its undying ability triggers, returning it from your graveyard to the battlefield with a +1/+1 counter on it.
  3. When Pith Driller enters the battlefield, it triggers, putting a -1/-1 counter on it.
  4. Resolve the Bloodflow Connoisseur ability, putting a +1/+1 counter on it.
  5. Repeat.
Results
Infinite +1/+1 counters on Bloodflow Connoisseur. Infinite death triggers. Infinite ETB. Infinite LTB. Infinite sacrifice triggers.

Mikaeus, the Unhallowed
0.75% of 1337 decks 10 decks
Varragoth, Bloodsky Sire
0.07% of 1366 decks 1 decks
Marchesa, the Black Rose
0.01% of 9321 decks 1 decks
High Synergy Cards
Putrid Goblin
82% of 11 decks +81% synergy
Carrion Feeder
83% of 12 decks +78% synergy
Ashnod's Altar
83% of 12 decks +76% synergy
Viscera Seer
83% of 12 decks +74% synergy
Skinrender
67% of 12 decks +66% synergy
Bloodthrone Vampire
67% of 12 decks +66% synergy
Nantuko Husk
67% of 12 decks +66% synergy
Puppeteer Clique
67% of 12 decks +65% synergy
Cryptic Trilobite
64% of 11 decks +63% synergy
Chainbreaker
58% of 12 decks +58% synergy
Top Cards
Mind Stone
75% of 12 decks +58% synergy
Dark Ritual
75% of 12 decks +53% synergy
Blood Artist
67% of 12 decks +55% synergy
Tatterkite
58% of 12 decks +58% synergy
Lingering Tormentor
58% of 12 decks +58% synergy
Wingrattle Scarecrow
58% of 12 decks +58% synergy
Phyrexian Ghoul
58% of 12 decks +58% synergy
Blasting Station
58% of 12 decks +58% synergy
Altar of Dementia
58% of 12 decks +56% synergy
Charcoal Diamond
58% of 12 decks +53% synergy
Creatures
Baleful Ammit
55% of 11 decks +54% synergy
Soulstinger
55% of 11 decks +54% synergy
Lesser Masticore
55% of 11 decks +54% synergy
Plague Belcher
55% of 11 decks +54% synergy
Walking Ballista
55% of 11 decks +52% synergy
Zulaport Cutthroat
55% of 11 decks +45% synergy
Blood Bairn
50% of 12 decks +50% synergy
Devouring Swarm
50% of 12 decks +50% synergy
Triskelion
50% of 12 decks +50% synergy
Vindictive Vampire
45% of 11 decks +44% synergy
Grim Haruspex
45% of 11 decks +41% synergy
Spincrusher
42% of 12 decks +42% synergy
Workhorse
42% of 12 decks +42% synergy
Pawn of Ulamog
42% of 12 decks +39% synergy
Falkenrath Noble
42% of 12 decks +39% synergy
Ayara, First of Locthwain
36% of 11 decks +33% synergy
Midnight Reaper
36% of 11 decks +33% synergy
Leaden Myr
33% of 12 decks +31% synergy
Festering Mummy
27% of 11 decks +27% synergy
Crystalline Crawler
27% of 11 decks +27% synergy
Smothering Abomination
27% of 11 decks +26% synergy
K'rrik, Son of Yawgmoth
27% of 11 decks +25% synergy
Yahenni, Undying Partisan
27% of 11 decks +24% synergy
Pitiless Plunderer
27% of 11 decks +20% synergy
Shambling Swarm
25% of 12 decks +25% synergy
Cinderhaze Wretch
25% of 12 decks +25% synergy
Necropede
25% of 12 decks +25% synergy
Gravecrawler
25% of 12 decks +22% synergy
Burnished Hart
25% of 12 decks +21% synergy
Gray Merchant of Asphodel
25% of 12 decks +16% synergy
Solemn Simulacrum
25% of 12 decks +11% synergy
Instants
Village Rites
36% of 11 decks +26% synergy
Corrupted Conviction
33% of 9 decks +28% synergy
Murder
25% of 12 decks +22% synergy
Culling the Weak
25% of 12 decks +21% synergy
Sorceries
Diabolic Tutor
33% of 12 decks +27% synergy
Diabolic Intent
33% of 12 decks +25% synergy
Sign in Blood
33% of 12 decks +24% synergy
Bone Shards
27% of 11 decks +26% synergy
Utility Artifacts
Phyrexian Altar
50% of 12 decks +46% synergy
Jet Medallion
42% of 12 decks +39% synergy
Swiftfoot Boots
42% of 12 decks +14% synergy
Wayfarer's Bauble
33% of 12 decks +23% synergy
Lightning Greaves
33% of 12 decks +8% synergy
Desecrated Tomb
27% of 11 decks +27% synergy
Spawning Pit
25% of 12 decks +25% synergy
Skullclamp
25% of 12 decks +13% synergy
Enchantments
Bastion of Remembrance
55% of 11 decks +48% synergy
Retribution of the Ancients
36% of 11 decks +36% synergy
Agent of the Iron Throne
27% of 11 decks +25% synergy
Heartless Summoning
25% of 12 decks +24% synergy
Utility Lands
Cabal Stronghold
36% of 11 decks +33% synergy
Urborg, Tomb of Yawgmoth
33% of 12 decks +23% synergy
Cabal Coffers
33% of 12 decks +22% synergy
Phyrexian Tower
25% of 12 decks +17% synergy
Temple of the False God
25% of 12 decks +15% synergy
Mana Artifacts
Sol Ring
83% of 12 decks -1% synergy
Arcane Signet
82% of 11 decks +10% synergy
Commander's Sphere
45% of 11 decks +30% synergy
Fellwar Stone
42% of 12 decks +21% synergy
Sceptre of Eternal Glory
30% of 10 decks +29% synergy
Caged Sun
25% of 12 decks +23% synergy
Everflowing Chalice
25% of 12 decks +20% synergy
Lands
Myriad Landscape
36% of 11 decks +17% synergy