A card like Elvish Mystic has to wait a turn until it can attack or be tapped to create green mana, but a card like Goblin Smuggler can attack the turn you cast it or use its tap ability that reads another target creature with power two or less cant be blocked this turn. Vigilance A creature with vigilance doesnt tap when it attacks
Resistance to Fighting and weakness to Lightning are the same too, and current rotations have made those desirable in standard play
Mewtwo ex (Psychic / Genetic Apex) The original legendary can do 150 damage, but it discards two energy in the process
2006-02-01 Errata'd to make it clear that only the cards you own go into your hand, so if you somehow gain control of the Cloister, your opponent's cards won't go to your hand.
However, there are plenty of budget options
Just Make the Trade In some scenarios, engaging with deathtouch creatures in combat is inevitable