Malcolm, Keen-Eyed Navigator + Magmaw + Imagecrafter + Worldwalker Helm

Malcolm, Keen-Eyed Navigator

Magmaw

Imagecrafter

Worldwalker Helm

How it works

1. Activate Imagecrafter by tapping it, causing Magmaw to become a Pirate until end of turn.
2. Activate Magmaw by paying 1 and sacrificing another nonland permanent, dealing 1 damage to an opponent.
3. Malcolm triggers, creating a Map and a Treasure token.
4. Activate a Treasure by tapping and sacrificing it, adding 1.
5. Repeat from step 2.