Flying

: Untap target creature. Activate only if you control a Gideon planeswalker.

+1: Until your next turn, prevent all damage target permanent would deal.

0: Until end of turn, Gideon of the Trials becomes a 4/4 Human Soldier creature with indestructible that's still a planeswalker. Prevent all damage that would be dealt to him this turn.

0: You get an emblem with "As long as you control a Gideon planeswalker, you can't lose the game and your opponents can't win the game."

Return all creatures blocking or blocked by target creature to their owner's hand.

(As this Saga enters and after your draw step, add a lore counter. Sacrifice after IV.)

I, II, III — Exile target nontoken creature an opponent controls until Trial of a Time Lord leaves the battlefield.

IV — Starting with you, each player votes for innocent or guilty. If guilty gets more votes, the owner of each card exiled with Trial of a Time Lord puts that card on the bottom of their library.

When Trial of Knowledge enters the battlefield, draw three cards, then discard a card.

When a Cartouche enters the battlefield under your control, return Trial of Knowledge to its owner's hand.

When Trial of Strength enters the battlefield, create a 4/2 green Beast creature token.

When a Cartouche enters the battlefield under your control, return Trial of Strength to its owner's hand.