See rule 607, Linked Abilities. 702.166d: If part of a spells ability has its effect only if that spell was bargained and that part of the ability includes any targets, the spells controller chooses those targets only if that spell was bargained
Even better, you get to pick one of those cards to add an additional two mana tax to cast it or activate abilities from it
The deck also adds a number of powerful removal spells (All is Dust, Oblivion Strike, Kozilek's Return, Abstruce Appropriation, Titan's Presence, Swords to Plowshares), as well as utility artifacts, spells, and enchantments to generate massive amounts of value
(2023-02-04) If a permanent ever has both +1/+1 counters and -1/-1 counters on it at the same time, they're removed in pairs as a state-based action so that the permanent has only one of those kinds of counters on it
Of course, while Caesar, Legions Emperor is the central piece in the new Fallout -themed Magic: The Gathering deck, acting as its Commander, there are 99 other cards in the set, some of which can and should be swapped out, giving place to better ones