Tyvar the Bellicose - [Extended Art] March of the Machine: The Aftermath (MAT) AVR Activate only if you control

Activate only if you control a Sliver

Creatures your opponents control lose deathtouch and can't have or gain deathtouch

They gain trample

Search target player's library for up to seven cards and exile them

Tyvar the Bellicose - [Extended Art] March of the Machine: The Aftermath (MAT) AVR Activate only if you controlWhenever one or more Elves you control attack, they gain deathtouch until end of turn. Each creature you control has "Whenever a mana ability of this creature resolves, put a number of +1 +1 counters on it equal to the amount of mana this creature produced. This ability triggers only once each turn."