This is a tier 6 fairly budget Saffi Eriskdotter combo deck. This deck contains four game-winning combos that the deck uses to win. Here are the combos explained, and various card choices. (If you know how these combos work, you may skip this part.)
Combo A: Saffi Eriskdotter + a recursion creature (Renegade Rallier, Sun Titan, Karmic Guide, or Reveillark) + a sacrifice outlet (Altar of Dementia or Blasting Station, or both Phyrexian Altar and Altar of the Brood.) First, sacrifice Saffi Eriskdotter to her ability, targeting your other combo creature. Let her go to the graveyard, rather than sending her to the command zone. Then sacrifice that creature to your sacrifice outlet, triggering Saffi Eriskdotter's ability and bringing the creature back. The creature than returns Saffi Eriskdotter to the battlefield, causing an infinite loop. Use this to either mill out your opponents with Altar of Dementia, or Phyrexian Altar and Altar of the Brood, or kill them with damage with Blasting Station. We have Green Sun's Zenith, Eladrami's Call, and Eldritch Evolution to find our combo creatures and Duskwatch Recruiter
, Once Upon a Time and Evolutionary Leap to help dig for our combo creatures.
Combo B: Heliod, Sun-Crowned + Walking Ballista. With Heliod Sun-Crowned on the battlefield, cast Walking Ballista for X=2, then activate Heliod Sun-Crowned to give Walking Ballista lifelink. Then activate Walking Ballista and deal one damage to an opponent, causing you to gain one life off of lifelink, triggering Heliod Sun-Crowned, which replaces the +1/+1 counter on Walking Ballista. This combo can be found off of a single Shared Summons or a Protean Hulk death trigger (find Heliod Sun-Crowned, and either Walking Ballista and Eternal Witness to get back Ballista when it dies right away, or Ranger-Captain of Eos to get Ballista out of the deck.)
Combo C: Devoted Druid + Vizier of Remedies or Melira, Sylvok Outcast + Walking Ballista (or Duskwatch Recruiter
/Nylea, Keen-Eyed to find Walking Ballista). With a not summoning sick Devoted Druid, act either of our -1/-1 counter-removing creatures. with those two cards, you can produce infinite mana due to Vizier of Remedies/Melira, Sylvok Outcast not letting the counter on Devoted Druid to materialize, allowing it to tap for a green mana and untap for free. Use an infinitely large Walking Ballista to win or use Duskwatch Recruiter to find it. These can be found with our various creature tutors and easily recurred if they get countered.
Combo D: Vizier of Remedies or Melira, Sylvok Outcast + persist creature (Kitchen Finks or Woodfall Primus + a sacrifice outlet (Altar of Dementia or Blasting Station, or both Phyrexian Altar and Altar of the Brood.) With all of the pieces on the battlefield, sacrifice the persist creature to the sacrifice outlet, triggering persist, which brings back the creature without the -1/-1 counter due to Vizier of Remedies/Melira, Sylvok Outcast. This loop kills your opponents with your sacrifice outlet via either damage or mill.
Ramp: Most of our ramp is creature-focused due to our creature-based combos and the recursive nature of the deck makes creatures that ramp when they enter the battlefield even more appealing than usual. These cards are Sakura-Tribe Elder, Azusa, Lost but Seeking, Wood Elves, Yavimaya Elder, Solemn Simulacrum, Nylea, Keen-Eyed, and Karametra, God of Harvests. The spell-based ramp package includes Green Sun's Zenith (it can find Dryad Arbor), Cultivate, The Great Henge and Sol Ring. Blighted Woodland and Krosan Verge can be sacrificed for two lands, also increasing our land count.
Removal: The removal is also mostly creature-based, with Quasali Pridemage, War Priest of Thune, Reclamation Sage, Aura Shards, Knight of Autumn, and Acidic Slime removing problematic artifacts and enchantments, and Woodfall Primus destroying any noncreature permanent when it enters the battlefield. We also run Path to Exile and Swords to Plowshares to get rid of troublesome creatures, along with Wrath of God to blow up all of the creatures in play. Generous Gift can also any threat that comes our way. Magus of the Disk is a recurrable wrath that also hits artifacts and enchantments, which can be a real burden for the rest of the table.
Combo Protection: To protect our creatures, we have Selfless Spirit and Dountless Escort to protect from either targeted removal or a wrath, and Mother of Runes and Giver of Runes to protect a combo piece. Hope of Ghirapur and Ranger-Captain of Eos shut out noncreature spells for a turn, while Veil of Summer protects from Dimir shenanigans. Shalai, Voice of Plenty gives ourselves and all of our creatures Hexproof, making it harder to interact with our combos.
Tutors: Ranger-Captain grabs a one- or zero-mana creature from our deck, while Recruiter of the Guard finds any two or less-toughness creature. Woodland Bellower finds a nonlegendary creature with converted mana cost three or less, while Protean Hulk usually finds a combo all by itself, searching for any number of creatures with total converted mana cost six or less. Green Sun's Zenith finds any green creature card in our deck and puts it onto the battlefield, Eladrami's Call finds any creature to our hand, and Eldritch Evolution upgrades a creature into a bigger one. Finally, Patter of Rebirth lets us find any creature and put it onto the battlefield when the creature wearing it dies.
Other Cards: Spore Frog and Spike Weaver work together to help keep out combat damage and protect our life total. Eternal Witness can bring back anything that gets countered or killed. Mentor of the Meek, Guardian Project and The Great Henge draw us and help find our combo pieces. Panharmonicon gives us even more value from all of our creatures, doubling their enters the battlefield triggers. Martyr's Bond functions as a Dictate of Erebos/Grave Pact to clear out our opponent's boards of creatures, while also severely disincentivising any removal on our board.
