(Cleaver is banned.)

Rising Tide (🌊) becomes a 1[$] Corroder, having base strength 2 once you've trashed your 2nd copy.

Synergies:

• Temporary Fracters: Like Propeller. Especially self-trashing ones (like a new Spike or Demara would be). Since they end up in the heap anyways.

• “Auxiliary” Fracters: Like Banner. Since it can be your 3rd Fracter, by complementing a pair of Rising Tides.

• Multi-type Fracters: Like Penrose or Lobisomem. Both are Decoder - Fracter’s, that primarily break codegates (thus filling the “decoder deckslot”), and only secondarily break barriers.

• Anarch self-mill/self-burn/sacrifice: Like Lago Paranoá Shelter and Tsakhia "Bankhar" Gantulga.

• Any novel “Utility” Icebreakers: Like Interface → Whenever a barrier subroutine resolves, gain 1[$]..

See s:fracter z:standard .

Within Elevation (as a core set), Tide:

• nudges newer players towards multiple copies of icebreakers. Which lets them get past Barriers sooner, keeps them from getting locked out by a Destroyer, and so on.
• has an explicit deckbuilding incentive. The 101 is just "sleeve up more fracters", and the 102 is "or cards that get those fracters into the heap".

NB. You can “expend” a second copy by over-installing the first (even if you have unused memory). CF. [click], 1[$], Trash this program from your grip: Place a “+1 strength” counter on an installed “Rising Tide” program.

When installing a program, the Runner may first trash any number of programs already installed. They must do so if installing the new program would exceed their memory limit.

— Rule 8.5.6.c. (thanks @zhansonic)