Malcolm, Keen-Eyed Navigator + Magmaw + Worldwalker Helm + Psychic Paper

Malcolm, Keen-Eyed Navigator

Magmaw

Worldwalker Helm

Psychic Paper

How it works

1. Activate Magmaw by paying 1 and sacrificing another nonland permanent, dealing 1 damage to an opponent.
2. Malcolm triggers, creating a Map and a Treasure tokens.
3. Activate a Treasure by tapping and sacrificing it, adding 1.
4. Repeat.