Prism Foundry
Touch the ends. Keep the shape. Fill both moulds.
How to play
Extract one exact tier4 horizontal BEAM and one exact tier4 vertical PILLAR, in either order. Rotate the incoming domino, choose a column, then drop. Its two cells form one rigid piece; the small #ID identifies that piece. Every fourth incoming shape is tier2, otherwise tier1.
Equal-tier pieces fuse only END-TO-END on the same axis: beams beside each other on one row, pillars directly above/below each other in one column. Side-by-side pillars and beams stacked on top do not fuse. The incoming piece absorbs its partner, gains one tier and keeps its orientation. Gold outlines forecast the partners that will be consumed.
After a fusion or extraction, all remaining pieces fall as whole rigid dominoes, never as separate cells. The incoming piece may then continue fusing; older pieces do not spontaneously fuse with each other. Watch the predicted final tier: tier5 is too large for a tier4 mould. Select either cell of a ready tier4 piece and Extract.28 shapes available; ready artefacts remain extractable after the last drop. Blocked drops cost nothing.