An attack from Vaporeon ex, for example, would not be able to instantly remove Pikachu ex from the field if it had full HP, even if its attack deals 280 damage to Pikachu exs 200 HP
fundamentally thin-skinned, self-contradictory, not the sharpest tool in the drawer
I still might go back and re-do that skull, as I think the alter is OK but not as good as it could be
Such triggered abilities start with "when" or "whenever." Some keyword abilities also include a triggered ability that happens when a permanent enters the battlefield, such as For Mirrodin
1999 1st Edition Base Set Venusaur PSA Population Report 6
This means that each of your powerful control spells can do double duty, being castable twice per game, significantly improving their consistency as well as your flexibility when choosing which spells to cast