Flash + Protean Hulk + Vigean Graftmage + Incubation Druid + Torch Courier

Flash

Protean Hulk

Vigean Graftmage

Incubation Druid

Torch Courier

How it works

1. Cast Flash putting Protean Hulk into play and choose not to pay.
2. Protean Hulk is sacrificed.
3. Grab Vigean Graftmage, Incubation Druid, & Torch Courier.
4. Vigean Graftmage's Graft ability triggers, move a counter to Incubation Druid.
5. Sacrifice Torch Courier to give Incubation Druid haste.
6. Tap Incubation Druid for and untap it with Vigean Graftmage, netting .
7. Repeat for infinite .
8. You can now untap Incubation Druid as much as you want to get infinite of your other colors.