Cheapest priced copy (Foundations Jumpstart): $0.35 at Card Kingdom, near mint, their price list as of .
Spined Tyrranax 
Creature — Dinosaur Beast · 5/5 · Uncommon · Foundations Jumpstart · #26
At the beginning of combat on your turn, you may pay {2}{G}. When you do, put a +1/+1 counter on target creature. That creature gains trample until end of turn. (It can deal excess combat damage to the player or planeswalker it's attacking.)
Legal inCommanderLegacyVintage
Not legal inBrawlStandardPioneerModernPauper
1 printing · $0.35 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Foundations Jumpstart | 26 | Uncommon | $0.35 | — |
One ruling from Wizards of the Coast
- 8 November 2024You don't choose a target for Spiked Tyrranax's ability at the time it triggers. Rather, a second "reflexive" ability triggers when you pay {2}{G} this way. You choose a target for that ability as it goes on the stack. Each player may respond to this triggered ability as normal.