Blistercoil Weird, Spiritcall Enthusiast // Scrollboost, and Splinter Twin

Prerequisites

• Blistercoil Weird on the battlefield
• Spiritcall Enthusiast // Scrollboost on the battlefield
• Splinter Twin on the battlefield

Steps

1. Activate Blistercoil Weird using the ability granted to it by Splinter Twin by tapping it, creating a creature token
2. When the token enters, Spiritcall Enthusiast triggers, causing it to become prepared
3. Activate Phyrexian Altar by sacrificing a creature token, adding
4. Cast a copy of Scrollboost by paying , targeting any valid target(s)
5. Blistercoil Weird triggers, giving it +1/+1 until end of turn and untapping it
6. Resolve Scrollboost, giving up to two creatures +2/+2 each until end of turn
7. Repeat

Results

• Infinite creature ETB
• Infinite creature LTB
• Infinite creature sacrifice triggers
• Infinite death triggers
• Infinite magecraft triggers
• Infinite storm count
• Infinitely large creatures you control until end of turn