Time Reversal lets you do the same thing for 2 extra mana, but you can play it again by retrieving from exile back to your hand with cards like Riftsweeper and Pull from Eternity
Fenrir is now free to attack for 3 damage or block for another turn
However, unless your deck is full of 1-power creatures or you anticipate a lot of double blocking happening, they are close enough that I would consider them about equal for purposes of the trade
The Tyranid SwarmUniverses Beyond: Warhammer 40,000Commander Deck set includes 1 ready-to-play Green-Blue-Red deck of 100Magic: The Gatheringcards (2 legendary traditional foil cards, 98 nonfoil cards), 1 foil-etched Display Commander (a thick cardstock copy of the commander card with foil etched into the cards border and art), 10 double-sided tokens, 1 deck box (can hold 100 sleeved cards), 1 life tracker, 1 strategy insert, and 1 reference card