Dragonlair Spider

two generic mana one red mana one green mana Creature — SpiderPower and toughness5/6

Reach

Whenever an opponent casts a spell, create a 1/1 green Insect creature token.

Swarms thrive in its nest, feeding on leathery bits of discarded wing.

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Price

0.43 $

13 printings · up to 3.72 $

Daily estimate from Scryfall, not a shop quote.

2012-06-01
The triggered ability will resolve and the Insect will be created before the spell that caused it to trigger resolves.
2012-06-01
The triggered ability won’t be affected if the spell that caused it to trigger is countered.

Reach is a static ability.

A creature with flying can’t be blocked except by creatures with flying and/or reach. (See rule , “Declare Blockers Step,” and rule , “Flying.”)

Multiple instances of reach on the same creature are redundant.