How can you create a combo with Idol of Endurance, Goblin Welder, Intruder Alarm, Gleaming Barrier, Ashnod's Altar?
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[START OF COMBO]This combo can be formed with Idol of Endurance, Goblin Welder, Intruder Alarm, Gleaming Barrier, Ashnod's Altar

Color identity: URW
Mana cost: 
Steps:
  1. Sacrifice Gleaming Barrier to Ashnod's Altar, generating {C}{C} and {W} from the treasure.
  2. Activate Golbin Welder by tapping it, sacrificing Idol of Endurance and returning Gleaming Barrier from the graveyard to the battlefield and triggering Intruder Alarm, untapping Goblin Welder and leaving {2}{W} floating.
  3. Activate Golbin Welder, sacrificing Gleaming Barrier and returning Idol of Endurance to play, exiling Gleaming Barrier to Idol of Endurance's trigger and adding {W} through the treasure, leaving {2}{W}{W} floating.
  4. Activate Idol of Endurance for {1}{W} and cast Gleaming Barrier without paying its mana cost, triggering Intruder Alarm and untapping Goblin Welder, leaving {1}{W} floating.
  5. Repeat for infinite colored and colorless mana.[END OF COMBO STEPS]

Result:
  - Infinite colored mana
  - Infinite colorless mana
  - Infinite death triggers
  - Infinite enters the battlefield
  - Infinite leaves the battlefield
  - Infinite sacrifice triggers
  - Infinite untap of all creatures
  - Infinite untap of creatures[END OF COMBO RESULT][END OF COMBO]

Other prerequisites:
  - All permanants must be on the battlefield
[END OF COMBO PREREQUISITES]
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