Players can't take actions between the time the creature is randomly chosen and the time at which the rest of the effects occur
To double a creature's power, that creature gets +X/+0, where X is that creature's power as Double Trouble resolves
Much like their tabletop counterparts, Vexilus Praetor does everything in its power to protect your commander from, well, everything
Lorwyn Eclipsed Commander Auntie Ool, Cursewretch Blight Curse Ashling, the Limitless Dance of the Elements Edge of Eternities Commander Kilo, Apogee Mind Counter Intelligence Szarel, Genesis Shepherd World Shaper Final Fantasy Commander Tidus, Yuna's Guardian Counter Blitz Cloud, Ex-SOLDIER Limit Break Terra, Herald of Hope Revival Trance Y'shtola, Night's Blessed Scions & Spellcraft Tarkir: Dragonstorm Commander Felothar the Steadfast Abzan Armor Shiko and Narset, Unified Jeskai Striker Zurgo Stormrender Mardu Surge Teval, the Balanced Scale Sultai Arisen Eshki, Temur's Roar Temur Roar Aetherdrift Commander Temmet, Naktamun's Will Eternal Might Saheeli, Radiant Creator Living Energy Duskmourn: House of Horror Commander Winter, Cynical Opportunist Death Toll Valgavoth, Harrower of Souls Endless Punishment Zimone, Mystery Unraveler Jump Scare

Since it sits firmly in an Esper token deck and the Blue and Black companion colors have no shortage of ways to increase evasion, this isnt a tall order, and will make a board go from weenie to winner in no time
Platinum Angel can be a hindrance for opponents while running your 5-color deck because they cant win the game and you cant lose the game