My first Vampire deck - still needs help

Commander / EDH* Lifegain Multiplayer RBW (Mardu) Tokens Vampires

Syun_Wukong

Creature (28)

• 1x Blood Artist
• 1x Bloodline Keeper  ^Flip
• 1x Bloodline Necromancer
• 1x Bloodlord of Vaasgoth
• 1x Butcher of Malakir
• 1x Captivating Vampire
• 1x Cruel Celebrant
• 1x Defiant Bloodlord
• 1x Drana's Emissary
• 1x Dusk Legion Zealot
• 1x Falkenrath Noble
• 1x Kheru Bloodsucker
• 1x Legion Lieutenant
• 1x Malakir Bloodwitch
• 1x Patron of the Vein
• 1x Sanctum Seeker
• 1x Sangromancer
• 1x Skeletal Vampire
• 1x Stromkirk Captain
• 1x Thief of Blood
• 1x Twilight Prophet
• 1x Vampire Cutthroat
• 1x Vampire Nighthawk
• 1x Viscera Seer
• 1x Anowon, the Ruin Sage
• 1x Elenda, the Dusk Rose
• 1x Massacre Girl
• 1x Sidisi, Undead Vizier

Land (33)

• 6x Mountain
• 6x Plains
• 8x Swamp
• 1x Bloodfell Caves
• 1x Boros Garrison
• 1x Boros Guildgate
• 1x Clifftop Retreat
• 1x Evolving Wilds
• 1x Gateway Plaza
• 1x Lotus Vale
• 1x Nomad Outpost
• 1x Path of Ancestry
• 1x Vivid Crag
• 1x Vivid Meadow
• 1x Wind-Scarred Crag
• 1x Urborg, Tomb of Yawgmoth

Instant (9)

• 1x Crackling Doom
• 1x Dark Bargain
• 1x Despark
• 1x Eerie Interlude
• 1x Faith's Reward
• 1x Mortify
• 1x Repel the Abominable
• 1x Swords to Plowshares
• 1x War Report

Enchantment (9)

• 1x Anointed Procession
• 1x Black Market
• 1x Blind Obedience
• 1x Cathars' Crusade
• 1x Dictate of Erebos
• 1x Exquisite Blood
• 1x Impact Tremors
• 1x Land Tax
• 1x Sanguine Bond

Commander (1)

Artifact (10)

• 1x Armillary Sphere
• 1x Ashnod's Altar
• 1x Coat of Arms
• 1x Commander's Sphere
• 1x Darksteel Ingot
• 1x Eldrazi Monument
• 1x Herald's Horn
• 1x Mana Geode
• 1x Well of Lost Dreams
• 1x Bontu's Monument

Sorcery (9)

• 1x Blood Tribute
• 1x Command the Dreadhorde
• 1x Diabolic Intent
• 1x Diabolic Tutor
• 1x Entreat the Dead
• 1x Exsanguinate
• 1x Kindred Charge
• 1x Survival Cache
• 1x Temporal Extortion

Planeswalker (1)

• 1x Sorin, Vengeful Bloodlord

Maybeboard

Creature (7)

• 1x Bloodcrazed Paladin
• 1x Champion of Dusk
• 1x Crimson Honor Guard
• 1x Stromkirk Condemned
• 1x Stromkirk Occultist
• 1x Vampire Warlord
• 1x Olivia Voldaren

Artifact (3)

• 1x Corrupted Grafstone
• 1x Mycosynth Lattice
• 1x Sphere of the Suns

Sorcery (1)

• 1x Dark Petition

Enchantment (2)

• 1x Call for Unity
• 1x Lich's Mastery

Instant (1)

• 1x Sanguine Sacrament

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I'm trying to build a Vampiric deck. Main focus: deal damage/gain life, make lots of vamps, sac tokens for triggers, repeat until dead. I'd like some help making it a relatively competitive, though, as I'm not the best deck builder. That being said, I absolutely love the Blood Tribute + Sanguine Bond combo and need ways of a) getting it more often and b) utilizing it against multiple players per game.

Top Ranked	Achieved #28 position overall 10 months ago Achieved #20 position in Commander / EDH 10 months ago Achieved #1 position in Commander / EDH Lifegain 10 months ago Achieved #1 position in Commander / EDH RBW (Mardu) 10 months ago
Date added	11 months
Last updated	10 months
Key combos	Blood Tribute + Sanguine Bond
Legality	This deck is Commander / EDH legal.
Rarity (main - side)	6 - 0 Mythic Rares 33 - 0 Rares 24 - 0 Uncommons 15 - 0 Commons
Cards	100
Avg. CMC	3.75
Tokens	1/1 Vampire, None Copy Clone, 1/1 Bat, 1/1 City's Blessing, 2/2 Vampire