Cheapest priced copy (Modern Masters): $0.35 at Card Kingdom, near mint, their price list as of .
Crush Underfoot 
Kindred Instant — Giant · Common · Modern Masters · #109
Choose a Giant creature you control. It deals damage equal to its power to target creature.
Legal inCommanderModernLegacyVintagePauper
Not legal inBrawlStandardPioneer
2 printings · $0.35 to $1.99 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Lorwyn | 162 | Uncommon | $0.49 | $1.99 |
| Modern Masters | 109 | Common | $0.35 | $0.49 |
4 rulings from Wizards of the Coast
- 7 June 2013Crush Underfoot doesn't target the Giant creature you control. You choose that Giant as Crush Underfoot resolves. If you don't control a Giant creature at that time, the spell will finish resolving with no effect.
- 7 June 2024Kindred is a card type that allows noncreature cards to have creature types. For example, Echoes of Eternity is an Eldrazi (although not a creature) while on the battlefield and an Eldrazi card (although not a creature card) in zones other than the battlefield.
- 7 June 2024While it appears only on cards that already have other card types, kindred is a card type and will be counted by effects that refer to the number of card types among cards in a zone.
- 7 June 2024This cards was originally printed with the "tribal" card type. That card type has been replaced with "kindred". This change does not affect the gameplay function of this card.