ancient mew holographic pokemon card value scuffs or border/edge wear PSA 10 1999 Japanese Ancient

Ral, Monsoon Mage / Ral, Leyline Prodigy I give a lot of credit to Ral, Monsoon Mage for having a planswalker's +1 ability before earning the spark, and the cost reduction feeds right into playing multiple instants or sorceries

Alternate win conditions that let you win the game when they resolve are very powerful

Riverchurn Monument, Salvation Engine), plus plenty of other artifacts that cost 1 less

It costs one more mana than Heros Downfall but will take out 98% of the things that spell will while also giving you scry 2, which is close in power level to drawing a card

If you really enjoy the artwork, that's my number one thing