A New Ice Age

I think liss package can genuinely bring new life to the old top tier days of trundle A.Sol and i'll try to explain. This might not be the final build of this kind of deck, but something like this will emerge and put A Sol back on tier 1 (I hope).

1st of all - "why the heck 1 off lissandra?" Well, Liss is meant to be played in this deck only in her flipped form, to generate the watcher, but its nice to have a tough unit early game that can block some stuff right (if needed) also, played on curve she generates a 8/8 (ok, its only on turn 11, but it can help finish games or even help to flip A Sol). But her role in the deck is to generate the watcher to bring one more win condition super late game and the oportunity to heal 11 HP with Roar is also nice for this deck.

Ice Shard - Oh boy... thats a "cold" one. In old Asol Trundle decks u could be high rolled for aggro players, and good/smart aggro players could also play aroud avalanche, but with the add of ICE SHARD, u can now punish open atacks, since its fast speed. Thats is really a GREAT tool for the deck. Keep in mind that Tf/Fizz matchup on this should be at minimum be bad, since u can punish elusive poros and burblefish with only 3 mana. 

Entomb - That could be arguably the best one. Hear me out, players that have experience on facing a sol trundle in the past, keep their hard removal for A sol, things like ledros control with vile feast/horror + vengeance or even demacia Asol decks with the suport of hush + concerted strike were a nightmare... But Entomb should put this to an end. With 5 mana u can now save your win condition (specially if u have a board to defend next atack). That possibility alone can make entomb a very welcome addition to the deck.

Honoroble Mentions (that also makes sense) - Blighted Ravine and 3 Sisters - Like i said before, this could not be the optimized final version of the deck, possible there is a world that u could run Blighted and Avalanche in the same deck. 3 sisters is also a consideration for the flexibility. A flash freeze could stop a Lethal Lee Sin kick and maybe a extra Entomb for +1 mana can make the difference.

To sumarize, liss put a extra win condition in the deck with the watcher, while her cards can save your win conditions with a good mana trade and punish aggro decks in ways that u could never done before.

Thats my take, lets bury the world in ice together boys!!!