Princess Yue, Astral Dragon, and Mercurial Pretender

Prerequisites

• Princess Yue on the battlefield
• Astral Dragon on the battlefield
• Mercurial Pretender on the battlefield
• available

Steps

1. Cast Mercurial Pretender by paying its mana cost
2. Choose to have it enter as a copy of Princess Yue
3. Put Mercurial Pretender into your graveyard due to the legend rule
4. When Mercurial Pretender dies, it triggers, returning it from your graveyard to the battlefield as a land named Moon
5. Choose to have it enter as a copy of Astral Dragon, gaining its abilities
6. When Mercurial Pretender enters, it triggers, creating two token copies of itself, thus creating two copies of Moon with Astral Dragon's abilities, that are 3/3 Dragon creatures in addition to its other types
7. Put all but one of the [[clones]] into your graveyard due to the legend rule
8. The Mercurial Pretender tokens each trigger
9. Resolve a trigger, creating two token copies of itself, thus creating two copies of Moon with Astral Dragon's abilities, that are 3/3 Dragon creatures in addition to its other types
10. Repeat from step 5

Results

• Infinite ETB
• Infinite LTB
• Infinite creature token copies of all noncreature permanents
• Infinite creature tokens
• Infinite death triggers
• Infinite landfall triggers