Puzzle may be solved as a standard Some Assembly Required, using logic to deduce placement of Pieces answers, as shown below:
| A | S | S | U | C | H | C | P | L | S | A | T |
| S | E | R | E | B | A | R | K | L | E | D | A |
| A | S | A | P | B | O | O | P | C | A | N | T |
| N | A | P | M | O | J | O | U | L | C | E | R |
| E | P | I | C | R | E | F | P | I | E | C | E |
| P | E | E | R | G | A | P | S | N | A | R | C |
| M | E | R | S | E | Y | A | T | E | T | A | Z |
| M | S | T | A | R | S | T | A | D | I | A | Z |
| M | A | R | G | A | R | E | T | P | E | R | U |
| C | I | E | N | M | E | N | U | A | T | A | P |
| A | C | A | I | M | I | S | T | V | I | P | S |
| I | N | C | A | L | A | T | U | S | H | E | R |
| S | T | I | G | M | A | S | U | P | E | D | S |
| E | I | R | E | M | A | I | D | L | E | N | T |
| R | T | E | Z | I | T | W | A | L | E | S | A |
The Pieces clue "A source of useful info and instructions (2 wds.)" must, by elimination, go with the answer ALL ENDS. Reading the ending letters of every clue spells this message:
ONE: J, U, Z; TWO: B, J, L, M, V; THREE: O, Y; FOUR: B, K; FIVE: H, P; SIX: C, G; FILL OS IN ROW FOUR; INVERT Y; ANIMAL SHOWN, TWO WORDS.
Assigning the numbered graphics below the grid to the indicated letters, and completing the other instructions, creates the image shown below, a KING COBRA.
