Bestow {3}{W} (If you cast this card for its bestow cost, it's an Aura spell with enchant creature. It becomes a creature again if it's not attached to a creature.) Mentor (Whenever this creature attacks, put a +1/+1 counter on target attacking creature with lesser power.) Enchanted creature gets +2/+2 and has mentor.
![Nyxborn Unicorn [Modern Horizons 3]](http://www.cardmerchanttakapuna.co.nz/cdn/shop/files/b66b881d-424e-5aa6-b62d-38c305d61590_9361e253-3b2e-411f-afc8-66cc76fa44d5.png?v=1723043634&width=1445)