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The other hilarious part of Gideon's Sacrifice is that we can just play it fairly by waiting for our opponent to damage us
In some cases this is showing the heroes journey, at a pivotal moment in their respective stories (think of it like character development)
As trample allows you to assign damage to an intended opponent or planeswalker after lethal damage is assigned to a blocking creature, deathtouch means you can assign one damage to the blocking creature to kill it and then assign the rest to the opponent or planeswalker
Mightyena can be obtained from Space-Time Smackdown: Dialga and Space-Time Smackdown: Palkia packs in the Space-Time Smackdown set
7 Braids, Conjurer Adept Braids, Conjurer Adept is a mono-blue commander who provides an incredibly powerful universal effect to each player in the form of letting players put cards of specified types directly into play each turn