Quicksilver Elemental, Incubation Druid, and Horseshoe Crab

Prerequisites

• Quicksilver Elemental on the battlefield
• Incubation Druid on the battlefield
• Horseshoe Crab on the battlefield
• Quicksilver Elemental has at least one +1/+1 counter on it
• Quicksilver Elemental does not have summoning sickness
• available

Steps

1. Activate Quicksilver Elemental twice by paying , causing it to gain all activated abilities of Incubation Druid and Horseshoe Crab until end of turn
2. Activate Quicksilver Elemental using Incubation Druid's first ability by tapping it, adding
3. Activate Quicksilver Elemental using Horseshoe Crab's ability by paying , untapping it
4. Repeat from step 2

Results

• Infinite colored mana