Glen Elendra Archmage + Hardened Academic + Phyrexian Altar

URW identity

Commander legal

The 3 combo pieces

• Glen Elendra Archmage
• Hardened Academic
• Phyrexian Altar

How to execute it

1. Activate Phyrexian Altar by sacrificing Glen Elendra Archmage.
2. When Glen Elendra Archmage dies, its persist ability triggers, returning it from your graveyard to the battlefield with a -1/-1 counter on it.
3. Hardened Academic triggers, putting a +1/+1 counter on Glen Elendra Archmage.
4. Repeat.

What the combo produces

• Infinite colored mana
• Infinite creature LTB
• Infinite death triggers
• Infinite ETB
• Infinite sacrifice triggers