The card has too many memory issues - As a general rule of thumb, cards that force a player to remember something are troublesome
Any card or ability that triggers the keyword is known as a 'Sacrifice outlet', and these are often combined with 'payoff' cards that create combos or advantages
However, you can also join the Wargamer Discord and be pinged for any potential retail-priced or below market value 'deals' as and when they pop up
If you have the mana, you can make a ton of creatures unblockable for only 2 mana each
I may not play this game competitively, or even actively, but I have played competitively in my lifetime, and have followed the game since its infancy
Tamiyo's Journal is a bit slow, but it can convert three Clues into an instant-speed Demonic Tutor