fix some edge-case bugs in ep3 server

src/Episode3/Card.cc

@@ -572,7 +572,9 @@ int32_t Card::move_to_location(const Location& loc) {
         this->loc.x = this->server()->warp_positions[warp_type][warp_end ^ 1][0];
         this->loc.y = this->server()->warp_positions[warp_type][warp_end ^ 1][1];
         cmd.change_type = 0;
+        cmd.card_refs.clear(0xFFFF);
         cmd.card_refs[0] = this->card_ref;
+        cmd.unknown_a2.clear(0xFFFFFFFF);
         this->server()->send(cmd);
         return 0;
       }

src/Episode3/PlayerState.cc

@@ -553,6 +553,8 @@ void PlayerState::discard_and_redraw_hand() {
   G_Unknown_GC_Ep3_6xB4x2C cmd;
   cmd.change_type = 3;
   cmd.client_id = this->client_id;
+  cmd.card_refs.clear(0xFFFF);
+  cmd.unknown_a2.clear(0xFFFFFFFF);
   this->server()->send(cmd);
 
   this->deck_state->restart();
@@ -641,6 +643,8 @@ bool PlayerState::do_mulligan() {
   G_Unknown_GC_Ep3_6xB4x2C cmd;
   cmd.change_type = 3;
   cmd.client_id = this->client_id;
+  cmd.card_refs.clear(0xFFFF);
+  cmd.unknown_a2.clear(0xFFFFFFFF);
   this->server()->send(cmd);
 
   this->deck_state->do_mulligan();

src/Episode3/RulerServer.cc

@@ -337,7 +337,7 @@ bool RulerServer::attack_action_has_rampage_and_not_pierce(
           break;
         }
       }
-      for (; cond_index >= 0; cond_index--) {
+      for (cond_index--; cond_index >= 0; cond_index--) {
         bool has_rampage = this->check_pierce_and_rampage(
             card_ref,
             ce->def.effects[cond_index].type,

src/Episode3/Server.cc

@@ -970,12 +970,14 @@ void Server::move_phase_after() {
             (abs(sc_card->loc.y - trap_y) < 2) &&
             ps->replace_assist_card_by_id(trap_card_id)) {
           G_Unknown_GC_Ep3_6xB4x2C cmd;
-          cmd.client_id = client_id;
           cmd.change_type = 0x01;
-          cmd.loc.direction = static_cast<Direction>(trap_type);
+          cmd.client_id = client_id;
+          cmd.card_refs.clear(0xFFFF);
           cmd.loc.x = trap_x;
           cmd.loc.y = trap_y;
+          cmd.loc.direction = static_cast<Direction>(trap_type);
           cmd.unknown_a2[0] = trap_card_id;
+          cmd.unknown_a2[1] = 0xFFFFFFFF;
           this->send(cmd);
         }
       }