Cheapest priced copy (Commander Masters): $0.49 at Card Kingdom, near mint, their price list as of .
Myriad Construct 
Artifact Creature — Construct · 4/4 · Rare · Zendikar Rising Promos · #246p
Kicker {3}
If this creature was kicked, it enters with a +1/+1 counter on it for each nonbasic land your opponents control.
When this creature becomes the target of a spell, sacrifice it and create a number of 1/1 colorless Construct artifact creature tokens equal to its power.
Legal inCommanderPioneerModernLegacyVintage
Not legal inBrawlStandardPauper
5 printings · $0.49 to $1.99 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Commander Masters | 963 | Rare | $0.49 | — |
| Zendikar Rising Promos | 246p | Rare | $0.49 | $1.49 |
| Zendikar Rising Promos | 246s | Rare | — | $1.99 |
| Zendikar Rising | 246 | Rare | $0.49 | $0.49 |
| Zendikar Rising | 376 | Rare | $0.59 | $0.79 |
9 rulings from Wizards of the Coast
- 25 September 2020An ability that triggers when a permanent becomes the target of a spell resolves before the spell that caused it to trigger. It resolves even if that spell is countered.
- 25 September 2020If a spell targets Myriad Construct more than once, its last ability triggers only once.
- 25 September 2020If you don't sacrifice Myriad Construct as its last ability resolves (perhaps because its ability triggered more than once and you've already sacrificed it), you still create Construct tokens. The number of tokens you create is determined by Myriad Construct's power as it last existed on the battlefield.
- 8 November 2024The kicker ability doesn't let you pay a kicker cost more than once.
- 8 November 2024If you put a permanent with a kicker ability onto the battlefield without casting it, you can't kick it.
- 8 November 2024If a card or token enters as a copy of a permanent, the new permanent isn't kicked, even if the original was.
- 8 November 2024If a spell's kicker cost was paid, the spell is "kicked."
- 8 November 2024To determine a spell's total cost, start with the mana cost (or an alternative cost if another card's effect allows you to pay one instead), add any cost increases (such as kicker), then apply any cost reductions. The spell's mana value remains unchanged, no matter what the total cost to cast it was.
- 8 November 2024If you copy a kicked spell on the stack, the copy is also kicked. If the copied spell is a permanent spell, the token the copy of that spell becomes when it enters is also kicked.