Trail of Mystery
Enchantment
(CMC 2)
Whenever a face-down creature enters the battlefield under your control, you may search your library for a basic land card, reveal it, put it into your hand, then shuffle.
Whenever a permanent you control is turned face up, if it's a creature, it gets +2/+2 until end of turn.
- [C19] Commander 2019 #186 (R)