Yenna by paying ({2} magic symbol) and tapping it, creating a nonlegendary token copy of Esper
Terra.
When the Esper
Terra token enters the battlefield, its first chapter ability triggers, creating a token copy of itself with haste and four lore counters on it.
When the new Esper
Terra token enters the battlefield, its first, second, third and fourth chapter abilities trigger.
Resolve the first and second trigger, creating token copies of any nonlegendary enchantment you control.
Resolve the fourth trigger, causing you to add ({W} magic symbol) ({W} magic symbol) ({U} magic symbol) ({U} magic symbol) ({B} magic symbol) ({B} magic symbol) ({R} magic symbol) ({R} magic symbol) ({G} magic symbol) ({G} magic symbol) and exile the Esper
Terra token.
Resolve the third trigger, creating a token copy of the Esper
Terra token created in step 1 with haste and four lore counters on it.
Repeat from step 3.
Notes
If you do not control other nonlegendary enchantments, this combo creates a mandatory infinite loop that'll end the game in a draw unless one of the combo pieces are removed from the battlefield.
Results
Infinite LTB.
Infinite ETB.
Infinite colored mana.
Infinite sacrifice triggers.
Infinite death triggers.
Draw the game.
Infinite creature tokens with haste.
Infinite creature copies of nonlegendary enchantments you control with haste.