When Terra enters, mill five cards. Put up to one enchantment card milled this way into your hand.

Trance — 4RG, T: Exile Terra, then return it to the battlefield transformed under its owner's control. Activate only as a sorcery.

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Esper Terra

[I][II][III] Create a token that's a copy of target nonlegendary enchantment you control. It gains haste. If it's a Saga, put up to three lore counters on it. Sacrifice it at the beginning of your next end step.

[IV] Add WW, UU, BB, RR, and GG. Exile Esper Terra, then return it to the battlefield (front face up)

Flying

When Terra enters, mill five cards. Put up to one enchantment card milled this way into your hand.
Trance — , : Exile Terra, then return it to the battlefield transformed under its owner's control. Activate only as a sorcery.

(As this Saga enters and after your draw step, add a lore counter.)
I, II, III — Create a token that's a copy of target nonlegendary enchantment you control. It gains haste. If it's a Saga, put up to three lore counters on it. Sacrifice it at the beginning of your next end step.
IV — Add , , , , and . Exile Esper Terra, then return it to the battlefield (front face up).
Flying