The Great Goblin + Mortuary + The Vision and Scarlet Witch + Yahenni, Undying Partisan

The Great Goblin

Mortuary

The Vision and Scarlet Witch

Yahenni, Undying Partisan

How it works

1. Activate Yahenni by sacrificing the Goblin, Orc or Army
2. When the Goblin, Orc or Army dies, The Great Goblin's second ability and Mortuary trigger.
3. Resolve the Mortuary trigger, putting the Goblin, Orc or Army onto the top of your library from your graveyard.
4. Resolve the Great Goblin trigger, exiling the Goblin, Orc or Army from the top of your library with the ability to play it until the end of your next turn.
5. Resolve the Yahenni ability
6. Cast the Goblin, Orc or Army from exile by paying its mana cost.
7. The Vision and Scarlet Witch triggers, adding and putting a +1/+1 counter on it
8. Repeat