(Its an artifact with 1 Colorless Mana, Tap, Sacrifice this token: Put a +1/+1 counter on target creature
Lets use these Joltik and Houndour as examples
Odd-Eyes Arc Pendulum Dragon X DARK Level 7 [ Dragon / PendulumNormal ] ATK 2700 DEF 2000 P Scale 8 If a face-up "Odd-Eyes" card(s) you control is destroyed by battle or card effect: You can Special Summon 1 "Odd-Eyes" monster from your hand, Deck, or GY
Specifically, it is a triggered ability that automatically activates when its condition is fulfilled
General general-board 40 15814 June 26, 2017 What are the true first Pokemon cards
The Extra Deck here has a few options that can help change things up depending on the situation, usually to get in extra damage in ways that catch the opponent off guard