Basically, players can sacrifice the card to grant indestructible to an allied creature along with a piece of equipment Zack Fair once used

Synchro Summon!" When Jack Summons "Celestial Wolf Lord, Blue Sirius" (by any method), a cut-in frame of Jack's face briefly appears, and he announces "Celestial Wolf Lord, Blue Sirius!" Most of the time when Jack attacks with that monster, he announces "Celestial Wolf Lord, Blue Sirius attacks!", followed by "Wolf's Fang!" When Jack activates that monster's effect, he announces "Celestial Wolf Lord, Blue Sirius's effect!", followed by "Blue Sublimation!" Before Jack Synchro Summons "Chaos King Archfiend", he announces "The new sovereign emerges from the chaos!", followed by "Synchro Summon!" When Jack Summons "Chaos King Archfiend" (by any method), a cut-in frame of Jack's face briefly appears, and he announces "Chaos King Archfiend!" Most of the time when Jack attacks with that monster, he announces "Attack, Chaos King Archfiend!" When Jack activates that monster's effect, he announces "Chaos King Archfiend's effect!" Before Jack Synchro Summons "Crimson Blader", he announces "This red blade announces the King's verdict

Exit From Exile(Red-Green)
First, we now tend to make cards that reward you for doing something the less-efficient way rather than punish you for doing it the more-efficient way
When youre playing against a beatstick deck, doubling one of your monsters attack is absurd and can overcome any foe