Talyndra, Owlbear Whisperer

Reach

Whenever a creature you control enters the
battlefield, if it’s a Bird or a Bear, you may search
your library for a basic land card, reveal it, put it
into your hand, then shuffle. If that creature is both
a Bird and a Bear, it gets +X/+X and gains haste
until end of the turn, where X is the number of
lands you control.