diff --git a/bin/solid.pill b/bin/solid.pill
index 1a0fc416d..090eb669e 100644
--- a/bin/solid.pill
+++ b/bin/solid.pill
@@ -1,3 +1,3 @@
 version https://git-lfs.github.com/spec/v1
-oid sha256:a4a8e1daf0bfe86d5fc4ef7060b0c6a6c2678a344787926f14bb4b8cfabe8752
-size 9549390
+oid sha256:54dae6825ebdcd680241ebcee83fbd4263c8f3dd71adf0009700e79d99c3be2c
+size 9627570
diff --git a/pkg/arvo/sys/hoon.hoon b/pkg/arvo/sys/hoon.hoon
index b56547e88..798cd2906 100644
--- a/pkg/arvo/sys/hoon.hoon
+++ b/pkg/arvo/sys/hoon.hoon
@@ -17290,6 +17290,14 @@
     =+  new=(~(mint ut sut) %noun gen)
     [new +>+<.$(mit (~(put by mit) [sut gen] new))]
   ::
+  ++  slam                                              ::  ++slam, cached
+    |=  [gat=vase sam=vase]
+    ^-  [vase worm]
+    =/  sut=type  [%cell p.gat p.sam]
+    =/  gen=hoon  [%cnsg [%$ ~] [%$ 2] [%$ 3] ~]
+    =^  new=type  +>+<.$  (play sut gen)
+    [[new (slum q.gat q.sam)] +>+<.$]
+  ::
   ++  slap                                              ::  ++slap, cached
     |=  {vax/vase gen/hoon}
     ^-  {vase worm}
diff --git a/pkg/arvo/tests/sys/hoon/vases.hoon b/pkg/arvo/tests/sys/hoon/vases.hoon
new file mode 100644
index 000000000..b782861b7
--- /dev/null
+++ b/pkg/arvo/tests/sys/hoon/vases.hoon
@@ -0,0 +1,33 @@
+/+  *test
+|%
+++  test-slam-wa  ^-  tang
+  ::
+  ;:  weld
+    %+  expect-eq
+      !>(7)
+      -:(~(slam wa *worm) !>(add) !>([3 4]))
+  ::
+    %+  expect-eq
+      !>(~[3 2 1])
+      -:(~(slam wa *worm) !>(flop) !>(~[1 2 3]))
+  ::
+    =|  =worm
+    =^  res1  worm  (~(slam wa worm) !>(flop) !>(`(list @)`~[1 2 3]))
+    =/  worm1  worm
+    =^  res2  worm  (~(slam wa worm) !>(flop) !>(`(list @)`~[4 5 6]))
+    ::
+    ;;  weld
+      %+  expect-eq
+        res1
+        !>(`(list @)`~[3 2 1])
+    ::
+      %+  expect-eq
+        res2
+        !>(`(list @)`~[6 5 4])
+    ::
+      %+  expect-eq
+        worm
+        worm1
+    ==
+  ==
+--