can you override "activate only at sorcery speed"

i was looking at [[thunderhead gunner]] for my [[mairsil, the pretender]] deck;

the first half of his ability is perfect, I can just loot 1 on each turn, and most creatures going to my yard can still be targeted my mairsil so its basically just a draw a turn.

it took me a while to actually read the middle part of it which says it can only be activated at sorcery speed.

so before I just remove the card from the list, is there any way to "fix" this (easily), does [[thousand-year elixir]] or anything like that help?