I just think Rydia's Return is overcosted and not good enough, though it does seem good out of the sideboard for slower matchups
That's because we're used to the idea that this is a reasonable price for a creature this size
If you do, you gain X life and draw X cards, where X is that creature's power
It can also be used defensively to keep attackers off your face or to reset things with counters on them
The deck includes a mix of removal, counter spells, card draw, and powerful planeswalkers who can help stabilize the board and take over the game
Its great on turn one or two to kill off early mana dorks, but its also effective in the late game as a cheap enabler for Dictate of Erebos or in the midgame against Timmy-style decks that drop a single threat each turn