Magic The Gathering of course is the grandaddy of collectible card games but fast forward over 40 years later and CCGs have become a sub-hobby all on their own
If you can take the monetary hit while its going for a relatively smaller amount of money in comparison to some of the other rare cards in rotation, snap one up if circumstances allow.
Then you may sacrifice a creature
Kudo, King Among Bears evens the playing fieldthough you can break the symmetry by loading your deck with anthems like Flowering of the White Tree and Maja, Bretagard Protector that ensure you have the biggest creatures
Flashback allows you to cast instant and sorcery spells from your graveyard for their flashback cost, letting you experience their effects once again
At 1 CMC, it gives a creature +2/+0, a +1/+1 counter, and trample