The most common cards to name with the spyglass are: Bristling Hydra Whirler Virtuoso Chandra, Torch of Defiance or other planeswalkers The Scarab God Gate to the Afterlife Electrostatic Pummeler Earthshaker Khenra or other Embalm/Eternalize creatures Ramunap Ruins Adanto, the First Fort Azcanta, the Sunken Ruin Or anything else you see with a colon
Playing elves, giving their creatures -1/-1 counters, and using your own elves to proliferate is very solid
It allows you to draw two cards a turn and clock your opponent
The set also has Magic's own cross over legendaries like Drana and Linvala, Ghalta and Mavren, and Kogla and Yidaro
I doubt well ever see eminence come back, but Id love to see some similar abilities around other tribes
Otherwise, Id look into strong synergy cards