The wording of Energy Retrieval is now as follows, "Put up to 2 basic Energy cards from your discard pile into your hand."
Source: TPCi Announcement (2020-01-09), TPCi Rules Team (2020-01-09)

Relevant cards

Note: All applicable cards may not be listed below.
WOTCB1_81
WOTCB2_110
WOTCB2_110
BW1_92
BW10_80
SM1_116
SM35_59
SWSH1_160
SWSH1_160
WOTCB1_81
WOTCLC_107
XY12_77
XY5_126
XY7_99