If no artist is listed, no letters are noted. You won't put a +1/+1 counter on Abstract Iguanart.
Abstract Iguanart
If the artist is credited in a language other than English, use the first character that appears (even if in that language, the character isn't a letter, strictly speaking).
If the card has multiple artists listed (usually separated by &), note the first letter of each of them. For example, if you cast a spell illustrated by Zoltan Boros & Gabor Sziksai, note the letters Z and G. If neither letter had previously been noted, you'd put two +1/+1 counters on Abstract Iguanart.
Magic: The Gathering · ™ & © Wizards of the Coast · Illus. Chris Seaman
Card data via Scryfall. Rarix is fan-made; not endorsed by the rights holders.
