Professor's Warning
BInstant
Choose one —
• Put a +1/+1 counter on target creature.
• Target creature gains indestructible until end of turn. (Damage and effects that say "destroy" don't destroy it.)
Professor Onyx urged the twins to prepare for the dark mage Extus, sounding very much like someone familiar with the rise of tyrants.
Market value
$0.27 – $0.33
Across paper printings · TCGplayer & Cardmarket market price
Card data via Scryfall. Paper market figures use TCGplayer market price and Cardmarket values that Scryfall syncs from affiliates. View on Scryfall · How Scryfall prices work. Prices refresh about every 24 hours — useful estimates, not a live storefront. Tappr is not the seller. Page checked 2026-09-16 06:41 UTC.
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