The most valuable Umbreon cards typically include 1st Edition holographic cards from early sets, Gold Star variants, Alt Art cards from modern sets, and promotional cards with limited distribution
Mana Drain WotC's justification for leaving one of the best counterspells ever in Mana Drain off the list is that the one-time surge of mana can be fun and won't usually do anything in the lategame that a player couldn't already do
Choose the primal intensity of Koraidon ex or the polished fortitude of Miraidon ex, each boasting a useful ability and strong attack, and then build up your collection with even more Pokemon and Trainer cards inside a handful of booster packs
This card (in combination with the previous card, Surrak) was my only out to a Sphinx of the Steel Wind in a fairly recent game
If you dont draw Jace, the Mind Sculptor, you can jam bigger Jace number one (Jace, Unraveler of Secrets), other four-drop Jace (Jace, Architect of Thought), smaller Jace (Jace Beleren), or really any of dozens of solid planeswalkers for similar effect