I feel the mechanic of Reverse Time has a negative impact on gameplay. The only truly effective counter is to have a means of drawing extra cards: bravery or hourglass, mainly. Mechanics like these, with such limited counters, are a big reason why rainbow/nova decks are so popular, and the more interesting possibilities in decks are sidelined in favor of quirky strategies and super-rushes. There's nothing wrong with quirky strategies, that's part of the fun of Elements, but certain mechanics, like Reverse Time, can limit players' creativity in creating new decks.
The problem lies in the stall mechanics. By placing a card on top of the deck, players can endlessly stall themselves or their opponents. Both of these are detrimental to the game. It sidesteps the possibility of decking out, and can create an impossible situation for decks that cannot draw more cards. On top of that, the AI is practically unaffected by this, as they draw extra cards, plus it's even harder to counter their RT's, as a deck with 3x time and a protected Eternity can stall you forever.
My suggestion is this: change the mechanic. Instead of returning a creature to the top of the deck, I believe we can make Reverse Time a more balanced and more interesting mechanic. Rather than remove the creature, I suggest that the game
return the target creature to it's original state. This prevents the stall (annoying and broken...both by players and AI) while still maintaining much of the card's functionality and purpose. Another alternative would be to put the card in the player's hand...but by adding certain exceptions I think even that can be avoided.
The following targets could be slightly different:
-Shard of Focus becomes a Black Hole
-A mutated/improved creature becomes the regular version of that creature.
-Skeletons still become random creatures.
-Possibly able to target invulnerable creatures - may or may not remove invulnerability. (probably not needed - but may be a compromise for losing stall functionality)
-Ash becomes a Phoenix?
Not sure what would be done with combination creatures(chimera, shard golem), but I feel that Reverse Time is one mechanic that is really limiting the game today. It is most certainly NOT okay the way it is, not if you want the kind of deck variety and creative thinking that this game is really capable of. I really don't get how this card slides by while much less potent cards and mechanics get people riled up. What do you guys think?