Blade of Shared Souls + Pentad Prism Combos

3 known combos featuring both cards in Commander

Infinite LTB Infinite ETB Infinite sacrifice triggers Infinite death triggers Infinite creature tokens

Combo 1 with Roalesk, Apex Hybrid + Basking Broodscale

Results: Infinite LTB · Infinite ETB · Infinite colored mana · Infinite sacrifice triggers · Infinite death triggers · Infinite colorless mana · Infinite creature tokens · Infinite proliferate · Infinite charge counters on a permanent · Infinite +1/+1 counters on a creature
Steps
  1. Activate Blade of Shared Souls' equip ability by paying {2}, attaching it to another creature you control.
  2. Blade of Shared Souls triggers, causing the creature it is attached to to become a copy of Roalesk.
  3. Put the creature with Blade of Shared Souls attached into your graveyard due to the legend rule.
  4. The creature triggers, putting two +1/+1 counters on Basking Broodscale and two charge counters on Pentad Prism.
  5. Basking Broodscale triggers twice, creating two 0/1 Eldrazi Spawn creature tokens.
  6. Activate Pentad Prism twice by removing two charge counters from it, adding {2}.
  7. Repeat.
  8. Alternatively, you may only remove one counter from Pentad Prism and sacrifice an Eldrazi Spawn instead.

Combo 2 with Roalesk, Apex Hybrid + Scurry Oak

Results: Infinite LTB · Infinite ETB · Infinite sacrifice triggers · Infinite death triggers · Infinite creature tokens · Infinite proliferate · Infinite +1/+1 counters on a creature
Show steps
  1. Activate Blade of Shared Souls' equip ability by paying {2}, attaching it to another creature you control.
  2. Blade of Shared Souls triggers, causing the creature it is attached to to become a copy of Roalesk.
  3. Put the creature with Blade of Shared Souls attached into your graveyard due to the legend rule.
  4. The creature triggers, putting two +1/+1 counters on Scurry Oak and two charge counters on Pentad Prism.
  5. Scurry Oak triggers twice, creating two 1/1 Squirrel creature tokens.
  6. Activate Pentad Prism twice by removing two charge counters from it, adding {2}.
  7. Repeat.

Combo 3 with Roalesk, Apex Hybrid + Herd Baloth

Results: Infinite LTB · Infinite ETB · Infinite sacrifice triggers · Infinite death triggers · Infinite creature tokens · Infinite proliferate · Infinite +1/+1 counters on a creature
Show steps
  1. Activate Blade of Shared Souls' equip ability by paying {2}, attaching it to another creature you control.
  2. Blade of Shared Souls triggers, causing the creature it is attached to to become a copy of Roalesk.
  3. Put the creature with Blade of Shared Souls attached into your graveyard due to the legend rule.
  4. The creature triggers, putting two +1/+1 counters on Herd Baloth and two charge counters on Pentad Prism.
  5. Herd Baloth triggers twice, creating two 4/4 Beast creature tokens.
  6. Activate Pentad Prism twice by removing two charge counters from it, adding {2}.
  7. Repeat.
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