If the fourth (or subsequent) time Dragon Whelp's ability is activated during the same turn is during that turn's end step, the delayed triggered ability won't trigger until the beginning of the next turn's end step. You'll have to sacrifice Dragon Whelp at that time.
There's no limit to the number of times you can activate Dragon Whelp's ability in a turn. However, the fourth activation in a turn and each subsequent activation will cause a delayed triggered ability that will force you to sacrifice Dragon Whelp at the beginning of the next end step.
The first three times Dragon Whelp's ability is activated in a turn will do nothing other than give it +1/+0 until end of turn. Any subsequent activations will also cause its delayed triggered ability to trigger. That means if you activate Dragon Whelp's ability five times, for example, two different delayed triggered abilities will trigger at the beginning of the next end step and cause you to sacrifice Dragon Whelp.
Last observed on Scryfall 2 months ago at $0.11. Over the trailing 90 days the price moved between $0.06 and $0.11 across 51 observations. Cross-checked across TCGplayer, eBay sold, Cardmarket EU, and Star City.
This printing is one of 2 catalogued treatments from DDG — the lineup includes Nonfoil alongside the standard finish. Across our catalog the Rarix library tracks every variant in the same family so collectors can compare price, scarcity and demand inside a single lineage.
Card #54 of *Duel Decks: Knights vs. Dragons*, the set that shipped alongside the April 2011 Duel Decks: Knights vs. Dragons release.
Card type: Creature — Dragon, color identity red, printed at uncommon. Uncommons fill the middle-tier slots in a standard booster configuration. Mana cost: {2}{R}{R} (4 converted). Keyword abilities: Flying.
Legal across the major constructed formats — Modern, Legacy, Vintage, and Commander — plus Standard rotation play.
EDHrec ranks this card #18,702 in Commander, putting it in the fringe-play tier of the format's playable pool.
Illustrated by Steven Belledin. Rarix catalogs 915 other cards credited to this artist.
Magic: The Gathering · ™ & © Wizards of the Coast · Illus. Steven Belledin
Card data via Scryfall. Rarix is fan-made; not endorsed by the rights holders.
If the fourth (or more) time Dragon Whelp's ability is activated during the same turn happens to be during that turn's end step, the delayed triggered ability won't trigger until the beginning of the next turn's end step. You'll have to sacrifice Dragon Whelp at that time.
