With these combo pieces dead and with the increasing prevalence of the Graveyard as an extended resource for many decks, the viability of decks focused entirely on discarding the opponents hand became less and less viable
Weaknesses: You have to use a vanilla Level 4 and a 2000 beater with a negative effect to actually play these cards
The best parts of the story of the Time Thieves include their rivalry with the S-Force, a group specifically designed to keep them from hopping timelines

Share #127 - Fan of Waves #128 - Korrinas Focus #129 - Level Ball #130 - Phoebe #131 - Rapid Strike Scroll of Swirls #132 - Rapid Strike Style Mustard #133 - Single Strike Scroll of Scorn #134 - Single Strike Style Mustard #135 - Sordward and Shielbert #136 - Tool Jammer #137 - Tower of Darkness #138 - Tower of Waters #139 - Urn of Vitality #140 - Rapid Strike Energy #141 - Single Strike Energy #142 - Kricketune V #143 - Flapple V #144 - Victini V #145 - Empoleon V #146 - Empoleon V #147 - Tapu Koko V #148 - Mimikyu V #149 - Necrozma V #150 - Single Strike Urshifu V #151 - Single Strike Urshifu V #152 - Rapid Strike Urshifu V #153 - Rapid Strike Urshifu V #154 - Tyranitar V #155 - Tyranitar V #156 - Corviknight V #157 - Stoutland V #158 - Bruno #159 - Cheryl #160 - Korrinas Focus #161 - Phoebe #162 - Rapid Strike Style Mustard #163 - Single Strike Style Mustard #164 - Flapple VMAX #165 - Victini VMAX #166 - Tapu Koko VMAX #167 - Single Strike Urshifu VMAX #168 - Single Strike Urshifu VMAX #169 - Rapid Strike Urshifu VMAX #170 - Rapid Strike Urshifu VMAX #171 - Corviknight VMAX #172 - Bruno #173 - Cheryl #174 - Korrinas Focus #175 - Phoebe #176 - Rapid Strike Style Mustard #177 - Single Strike Style Mustard #178 - Octillery #179 - Houndoom #180 - Exp

Regrowth allowed you to reuse your restricted cards a little too easily (only got unrestricted recently, 2013!) There had also been a new set released in the meantime: Antiquities
A rare example of a deck which places all of its key cards in its main deck, this deck does best against decks which deploy few or no disruptive effect in order to most effectively complete its Ritual Summons