He asks your opponent to have something very specific, like a "target opponent sacrifices" effect, a board wipe that gets around Regenerate, and/or a way to shrink him through toughness reduction
That means that typically speaking getting your Pokemon axed is like if when a creature died you had to sacrifice two or three lands
At the beginning of your end step, if a player controls no creatures, sacrifice Sothera, then put a creature card exiled with it onto the battlefield under your control with two additional +1/+1 counters on it
Since Artifact Scythe is banned, this is one of the few ways to do so
Instead of countering that pesky Chandra's IgnitionChandra's Ignition, give away your own Dralnu and watch your opponent roast over the flames
Characters mentioned were Pluto , Perdita from 101 Dalmations, Kit Cloudkicker from TaleSpin, Jim Hawkins from Treasure Planet, and more from the RLS Legacy crew