Sin, Unending Cataclysm

Gameplan

Sin is a Simic +1/+1 counters payoff that turns your whole board's counters into a massive flying, trampling threat. Spend the early game building counters on cheap creatures with proliferate and counter generators, then cast Sin to vacuum them up at double value for a one- or two-swing kill. Its death trigger reroutes the counters onto another creature and shuffles Sin back in, so it's hard to permanently answer.

Key Cards

• Hardened Scales — Multiplies every counter you place, dramatically inflating Sin's eventual size.
• Branching Evolution — Doubles +1/+1 counter generation, stacking with Sin's own doubling on entry.
• Inexorable Tide — Proliferate every spell builds a wide counter base for Sin to harvest.
• Doubling Season — Doubles counters entering, supercharging your whole board before Sin arrives.
• Rishkar, Peema Renegade — Cheaply scatters counters across creatures and ramps, feeding Sin's entry trigger.
• Ozolith, the Shattered Spire — Adds counters and protects them, ensuring a big payload when Sin enters or dies.
• Cathars' Crusade — Floods the board with counters every time a creature enters for Sin to scoop up.
• Rapid Hybridization — Cheap protection/interaction in color to clear blockers before a lethal swing.

Upgrade Path

Prioritize counter doublers (Hardened Scales, Branching Evolution, Doubling Season) and repeatable proliferate (Evolution Sage, Inexorable Tide) to make Sin enormous on entry. Add evasion and protection like Inkshield, Heroic Intervention, and Lightning Greaves so your one big creature actually connects, plus a Pathbreaker Ibex or Triumph of the Hordes as a backup overrun finisher. Tighten the curve with cheap counter engines and ramp (Sol Ring, Simic Signet, Rishkar) so Sin lands on turn five or six with a lethal payload.