Spell Queller, and Flickering Hound

Prerequisites

• Spell Queller on the battlefield
• Flickering Hound on the battlefield

Steps

1. Cast the first creature spell from your hand by paying its mana cost
2. Flickering Hound triggers, blinking Spell Queller
3. When Spell Queller enters, its first ability triggers, exiling the first creature spell
4. Cast the second creature spell from your hand by paying its mana cost
5. Flickering Hound triggers, blinking Spell Queller
6. When Spell Queller enters, its first and second abilities trigger
7. Resolve the first trigger, exiling the second creature spell
8. Resolve the second trigger, casting the first creature spell from exile without paying its mana cost
9. Flickering Hound triggers, blinking Spell Queller
10. When Spell Queller enters, its first and second abilities trigger
11. Resolve the first trigger, exiling the first creature spell
12. Resolve the second trigger, casting the second creature spell from exile without paying its mana cost
13. Repeat from step 5

Results

• Infinite creature ETB
• Infinite creature LTB
• Infinite storm count